dependence of continuous effects

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Hi,

a rather theoretical question :

When do you determine whether a continuous effect depends on another one ?
Can it be done outside of the game, or does it have to take the game status
into account ? For example, does "all black creatures have fear" always
depend on "all permanents are black", even though in an actual game the
second effect might be sleighted ?

r2warrior
 
Archived from groups: rec.games.trading-cards.magic.rules (More info?)

Christophe Dehlinger <dehlinger@evc.net> wrote:

> Hi,
>
> a rather theoretical question :
>
> When do you determine whether a continuous effect depends on another one ?
> Can it be done outside of the game, or does it have to take the game status
> into account ? For example, does "all black creatures have fear" always
> depend on "all permanents are black", even though in an actual game the
> second effect might be sleighted ?

It would still be dependent. It *changes* what the first effect applies
to. (And if there are no creatures in play at the moment, the order of
those effects doesn't particularly matter anyway.)

418.5c An effect is said to "depend on" another if (a) it is applied in
the same layer as the other effect (see rule 418.5a) and (b) applying
the other would change the text or the existence of the first effect,
what it applies to, or what it does to any of the things it applies to.
Otherwise, the effect is considered to be independent of the other
effect.
--
Daniel W. Johnson
panoptes@iquest.net
http://members.iquest.net/~panoptes/
039 53 36 N / 086 11 55 W
 
Archived from groups: rec.games.trading-cards.magic.rules (More info?)

----- Original Message -----
From: "Daniel W. Johnson" <panoptes@iquest.net>
Newsgroups: rec.games.trading-cards.magic.rules
Sent: Tuesday, September 21, 2004 7:07 PM
Subject: Re: dependence of continuous effects


> Christophe Dehlinger <dehlinger@evc.net> wrote:
>
> > Hi,
> >
> > a rather theoretical question :
> >
> > When do you determine whether a continuous effect depends on another one
?
> > Can it be done outside of the game, or does it have to take the game
status
> > into account ? For example, does "all black creatures have fear" always
> > depend on "all permanents are black", even though in an actual game the
> > second effect might be sleighted ?
>
> It would still be dependent. It *changes* what the first effect applies
> to. (And if there are no creatures in play at the moment, the order of
> those effects doesn't particularly matter anyway.)
>
OK, a color-changing effect was a bad example for what I meant, as it
"erases" all of the former colors of the permanent. What if the second
effect instead read "all permanents are black in addition to their other
colors" ? This new effect indeed changes what the 1st effect applies to, but
not its sleighted version.

> 418.5c An effect is said to "depend on" another if (a) it is applied in
> the same layer as the other effect (see rule 418.5a) and (b) applying
> the other would change the text or the existence of the first effect,
> what it applies to, or what it does to any of the things it applies to.
> Otherwise, the effect is considered to be independent of the other
> effect.
> --
> Daniel W. Johnson
> panoptes@iquest.net
> http://members.iquest.net/~panoptes/
> 039 53 36 N / 086 11 55 W
 
Archived from groups: rec.games.trading-cards.magic.rules (More info?)

Christophe Dehlinger <dehlinger@evc.net> wrote:

> OK, a color-changing effect was a bad example for what I meant, as it
> "erases" all of the former colors of the permanent. What if the second
> effect instead read "all permanents are black in addition to their other
> colors" ? This new effect indeed changes what the 1st effect applies to, but
> not its sleighted version.

An effect sleighted to "all permanents are white in addition to any
other colors" would be independent of "all black creatures have fear".
(Note that the sleight itself is applied in layer 3 and the others in
layer 5.) They would be applied in timestamp order, not that it
matters.
--
Daniel W. Johnson
panoptes@iquest.net
http://members.iquest.net/~panoptes/
039 53 36 N / 086 11 55 W
 
Archived from groups: rec.games.trading-cards.magic.rules (More info?)

On Tue, 21 Sep 2004, Daniel W. Johnson wrote:

> Christophe Dehlinger <dehlinger@evc.net> wrote:
>
>> OK, a color-changing effect was a bad example for what I meant, as it
>> "erases" all of the former colors of the permanent. What if the second
>> effect instead read "all permanents are black in addition to their other
>> colors" ? This new effect indeed changes what the 1st effect applies to, but
>> not its sleighted version.
>
> An effect sleighted to "all permanents are white in addition to any
> other colors" would be independent of "all black creatures have fear".
> (Note that the sleight itself is applied in layer 3 and the others in
> layer 5.) They would be applied in timestamp order, not that it
> matters.
>

They're in the same layer so the _are_ dependent by the rule you just
quoted:

418.5c An effect is said to "depend on" another if (a) it is applied
in the same layer as the other effect ...
--
David
 
Archived from groups: rec.games.trading-cards.magic.rules (More info?)

David de Kloet <dskloet@few.vu.nl> wrote:

> They're in the same layer so the _are_ dependent by the rule you just
> quoted:
>
> 418.5c An effect is said to "depend on" another if (a) it is applied
> in the same layer as the other effect ...

AND

(b) applying the other would change the text or the existence of the
first effect, what it applies to, or what it does to any of the things
it applies to. Otherwise, the effect is considered to be independent of
the other effect.
--
Daniel W. Johnson
panoptes@iquest.net
http://members.iquest.net/~panoptes/
039 53 36 N / 086 11 55 W
 
Archived from groups: rec.games.trading-cards.magic.rules (More info?)

Christophe Dehlinger <dehlinger@evc.net> wrote:
>a rather theoretical question :
>
>When do you determine whether a continuous effect depends on another one ?
>Can it be done outside of the game, or does it have to take the game status
>into account ? For example, does "all black creatures have fear" always
>depend on "all permanents are black", even though in an actual game the
>second effect might be sleighted ?

That's one of the great not-very-talked about questions of timestamp/
dependency. I -prefer- to think of effects as depending on each other or
not, independent of what other effects MIGHT be affecting them or what
permanents may or may not be in play. This vision makes more things depend
on each other, at least potentially, as in your example.

The problem with having to look in play to see if there IS a creature around,
before determining whether your first effect depends on the second, is that
you don't really know whether there ARE any creatures in play without
applying continuous effects to them. (Granted, in this case you know whether
things are creatures once you're past layer 4, and both of the above are in
layer 5 ... but still, making one depend on the other =depending on= whether
any creatures are in play right now gets Really Complicated Really Quickly.)

And yes, in practice this vision means that anything that looks for color
depends on anything else that changes color _and_ anything else that changes
color words, regardless of whether the color words involved currently match.
I don't have much problem thinking of it that way; some other people do...

Dave
--
\/David DeLaney posting from dbd@vic.com "It's not the pot that grows the flower
It's not the clock that slows the hour The definition's plain for anyone to see
Love is all it takes to make a family" - R&P. VISUALIZE HAPPYNET VRbeable<BLINK>
http://www.vic.com/~dbd/ - net.legends FAQ & Magic / I WUV you in all CAPS! --K.
 
Archived from groups: rec.games.trading-cards.magic.rules (More info?)

David DeLaney <dbd@gatekeeper.vic.com> wrote:

> That's one of the great not-very-talked about questions of timestamp/
> dependency. I -prefer- to think of effects as depending on each other or
> not, independent of what other effects MIGHT be affecting them or what
> permanents may or may not be in play. This vision makes more things depend
> on each other, at least potentially, as in your example.
>
> The problem with having to look in play to see if there IS a creature around,
> before determining whether your first effect depends on the second, is that
> you don't really know whether there ARE any creatures in play without
> applying continuous effects to them. (Granted, in this case you know whether
> things are creatures once you're past layer 4, and both of the above are in
> layer 5 ... but still, making one depend on the other =depending on= whether
> any creatures are in play right now gets Really Complicated Really Quickly.)

Depending on how you process dependencies, the absence of creatures (or
whatever) might also make that moot. If there are no creatures in play,
an "all black creatures gain fear" effect won't be doing anything
anyway. (There doesn't seem to be any card with that particular effect,
but there are some that grant protection or landwalk to creatures of a
certain color.)

> And yes, in practice this vision means that anything that looks for color
> depends on anything else that changes color _and_ anything else that changes
> color words, regardless of whether the color words involved currently match.
> I don't have much problem thinking of it that way; some other people do...

My way of thinking of this: An "all permanents are black" effect could
be treated as five simultaneous effects: "all permanents get black",
"all permanents lose green", "all permanents lose white", "all
permanents lose blue", "all permanents lose red". (An effect that
worked like Blanket of Night would just do the first of these.) Any
other effect that cares about color will be dependent on one of these,
regardless of what anyone does with Sleight of Mind. My other thought
is that Sleight of Mind itself works in layer 3, so condition (a) in
rule 418.5c is going to put it outside of the dependency rules.
--
Daniel W. Johnson
panoptes@iquest.net
http://members.iquest.net/~panoptes/
039 53 36 N / 086 11 55 W
 
Archived from groups: rec.games.trading-cards.magic.rules (More info?)

David de Kloet <dskloet@few.vu.nl> wrote:
>They're in the same layer so the _are_ dependent by the rule you just
>quoted:
>
>418.5c An effect is said to "depend on" another if (a) it is applied
>in the same layer as the other effect ...

You have snipped the relevant word, which is NOT an "or". Things aren't
dependent on each other JUST because they're in the same layer. The snipped
word is an "and" - both a and b have to apply to cause dependency.

Dave
--
\/David DeLaney posting from dbd@vic.com "It's not the pot that grows the flower
It's not the clock that slows the hour The definition's plain for anyone to see
Love is all it takes to make a family" - R&P. VISUALIZE HAPPYNET VRbeable<BLINK>
http://www.vic.com/~dbd/ - net.legends FAQ & Magic / I WUV you in all CAPS! --K.
 
Archived from groups: rec.games.trading-cards.magic.rules (More info?)

On Tue, 21 Sep 2004, Daniel W. Johnson wrote:

> David de Kloet <dskloet@few.vu.nl> wrote:
>
>> They're in the same layer so the _are_ dependent by the rule you just
>> quoted:
>>
>> 418.5c An effect is said to "depend on" another if (a) it is applied
>> in the same layer as the other effect ...
>
> AND
>
> (b) applying the other would change the text or the existence of the
> first effect, what it applies to, or what it does to any of the things
> it applies to. Otherwise, the effect is considered to be independent of
> the other effect.

Oops, read an "or". Sorry.

--

David
 
Archived from groups: rec.games.trading-cards.magic.rules (More info?)

"David DeLaney" <dbd@gatekeeper.vic.com> a écrit dans le message de
news:slrncl22o8.g61.dbd@gatekeeper.vic.com...
> Christophe Dehlinger <dehlinger@evc.net> wrote:
> >a rather theoretical question :
> >
> >When do you determine whether a continuous effect depends on another one
?
> >Can it be done outside of the game, or does it have to take the game
status
> >into account ? For example, does "all black creatures have fear" always
> >depend on "all permanents are black", even though in an actual game the
> >second effect might be sleighted ?
>
> That's one of the great not-very-talked about questions of timestamp/
> dependency. I -prefer- to think of effects as depending on each other or
> not, independent of what other effects MIGHT be affecting them or what
> permanents may or may not be in play. This vision makes more things depend
> on each other, at least potentially, as in your example.
>
> The problem with having to look in play to see if there IS a creature
around,
> before determining whether your first effect depends on the second, is
that
> you don't really know whether there ARE any creatures in play without
> applying continuous effects to them. (Granted, in this case you know
whether
> things are creatures once you're past layer 4, and both of the above are
in
> layer 5 ... but still, making one depend on the other =depending on=
whether
> any creatures are in play right now gets Really Complicated Really
Quickly.)
>
> And yes, in practice this vision means that anything that looks for color
> depends on anything else that changes color _and_ anything else that
changes
> color words, regardless of whether the color words involved currently
match.
> I don't have much problem thinking of it that way; some other people do...
>
> Dave
> --
> \/David DeLaney posting from dbd@vic.com "It's not the pot that grows the
flower
> It's not the clock that slows the hour The definition's plain for anyone
to see
> Love is all it takes to make a family" - R&P. VISUALIZE HAPPYNET
VRbeable<BLINK>
> http://www.vic.com/~dbd/ - net.legends FAQ & Magic / I WUV you in all
CAPS! --K.

Well, that was the vision I was hoping for :) . I haven't been looking into
this with actual cards, but don't these sometimes "unwarranted" dependencies
create counter-intuitive results ? For example, if we throw an extra effect
into the mix :
1) All black creatures gain fear
2) All creatures lose fear
3) All creatures are black in addition to their other colors
4) Replace "black" with "blue" in the ability generating 3)
1,2 and 3 are listed in timestamp order, 4's timestamp should be irrelevant
as it is not in the same layer as the other three. With this vision, there
is a single dependency, namely of 1 on 3. So 1 is delayed and applied after
4,2 and 3, so that in the end all black creatures have fear, which is not
what one might expect. This most likely isn't a big issue however, as the
problematic situations seem to rarely (if ever) occur in actual play, and
the only consequence then is a slighltly odd behaviour of the rules.
Also note that the variant you hinted at, namely applying effects of the
previous layers before checking for dependencies in the current layer, makes
the above example work correctly.

But I was quite surprised that this is only a vision. Isn't there an
official statement on this issue ? As the (hopefully correct) above example
shows, the precise dependency definition does matter in some cases. What
does MTGO, who computes continuous effects interactions all day long, take
into account when checking dependencies ?

Christophe
 
Archived from groups: rec.games.trading-cards.magic.rules (More info?)

Christophe Dehlinger <dehlinger@evc.net> wrote:

> ... which is not what one might expect.

Apparently, all the proposed systems for handling interacting effects
can be sorted into two categories:

1) Those that have some counter-intuitive consequences.

2) Those that can only be understood by their proposer.
--
Daniel W. Johnson
panoptes@iquest.net
http://members.iquest.net/~panoptes/
039 53 36 N / 086 11 55 W
 
Archived from groups: rec.games.trading-cards.magic.rules (More info?)

Christophe Dehlinger <dehlinger@evc.net> wrote:
>Well, that was the vision I was hoping for :) . I haven't been looking into
>this with actual cards, but don't these sometimes "unwarranted" dependencies
>create counter-intuitive results ? For example, if we throw an extra effect
>into the mix :
>1) All black creatures gain fear
>2) All creatures lose fear
>3) All creatures are black in addition to their other colors
>4) Replace "black" with "blue" in the ability generating 3)

(Sleight of Mind, in other words)

>1,2 and 3 are listed in timestamp order, 4's timestamp should be irrelevant
>as it is not in the same layer as the other three.

Right; it's down in layer 3, the others are up in 5.

>With this vision, there is a single dependency, namely of 1 on 3.

Well ... it's a potential dependency. In this case it's _not_ a dependency,
because when you look at the effects when you get to layer 5, 3 doesn't
change anything 1 depends on. Contrast this to without-the-Sleight, where
it -is- a dependency.

>Also note that the variant you hinted at, namely applying effects of the
>previous layers before checking for dependencies in the current layer, makes
>the above example work correctly.

Right. Which is what the rules do say to do - things can only depend on each
other if they're in the same layer. (If they're in different layers, one is
ALWAYS applied before the other, no matter what it may change or the other
may look for. Thus "All green creatures get +1/+1" does NOT technically
depend on "All creatures are green", because the former is layer 6 while
the latter is layer 5, and you can't "swap their order".)

>But I was quite surprised that this is only a vision. Isn't there an
>official statement on this issue ? As the (hopefully correct) above example
>shows, the precise dependency definition does matter in some cases. What
>does MTGO, who computes continuous effects interactions all day long, take
>into account when checking dependencies ?

Don't know. The "official statement" is what's in the rules. That still needs
interpretation; problem is that multiple interpretations, -some- of which
actually make a difference, exist among netreps/gurus, -and- no one interp
turns out to be both simple enough and comprehensible enough (and not-argued-
against enough) to add to the rulebook...

Dave
--
\/David DeLaney posting from dbd@vic.com "It's not the pot that grows the flower
It's not the clock that slows the hour The definition's plain for anyone to see
Love is all it takes to make a family" - R&P. VISUALIZE HAPPYNET VRbeable<BLINK>
http://www.vic.com/~dbd/ - net.legends FAQ & Magic / I WUV you in all CAPS! --K.
 
Archived from groups: rec.games.trading-cards.magic.rules (More info?)

Let me try again...

On Wed, 22 Sep 2004, Christophe Dehlinger wrote:

> Well, that was the vision I was hoping for :) . I haven't been looking into
> this with actual cards, but don't these sometimes "unwarranted" dependencies
> create counter-intuitive results ? For example, if we throw an extra effect
> into the mix :
> 1) All black creatures gain fear
> 2) All creatures lose fear
> 3) All creatures are black in addition to their other colors
> 4) Replace "black" with "blue" in the ability generating 3)
> 1,2 and 3 are listed in timestamp order, 4's timestamp should be irrelevant
> as it is not in the same layer as the other three. With this vision, there
> is a single dependency, namely of 1 on 3. So 1 is delayed and applied after

Is 1 delayed or is 3 moved to the front? Reading this rule:

418.5d Whenever one effect depends on another, the independent one is
applied first. If several dependent effects form a loop, or if none
depends on another, they're applied in "timestamp order."

I'd think 3 is applied first and then 1 and 2.

> 4,2 and 3, so that in the end all black creatures have fear, which is not
> what one might expect. This most likely isn't a big issue however, as the
> problematic situations seem to rarely (if ever) occur in actual play, and
> the only consequence then is a slighltly odd behaviour of the rules.
> Also note that the variant you hinted at, namely applying effects of the
> previous layers before checking for dependencies in the current layer, makes
> the above example work correctly.
>
> But I was quite surprised that this is only a vision. Isn't there an
> official statement on this issue ? As the (hopefully correct) above example
> shows, the precise dependency definition does matter in some cases. What
> does MTGO, who computes continuous effects interactions all day long, take
> into account when checking dependencies ?
>
> Christophe
--

David
 
Archived from groups: rec.games.trading-cards.magic.rules (More info?)

"David de Kloet" <dskloet@few.vu.nl> a écrit dans le message de
news😛ine.GSO.4.61.0409222013090.1958@galjas.cs.vu.nl...
> Let me try again...
>
> On Wed, 22 Sep 2004, Christophe Dehlinger wrote:
>
> > Well, that was the vision I was hoping for :) . I haven't been looking
into
> > this with actual cards, but don't these sometimes "unwarranted"
dependencies
> > create counter-intuitive results ? For example, if we throw an extra
effect
> > into the mix :
> > 1) All black creatures gain fear
> > 2) All creatures lose fear
> > 3) All creatures are black in addition to their other colors
> > 4) Replace "black" with "blue" in the ability generating 3)
> > 1,2 and 3 are listed in timestamp order, 4's timestamp should be
irrelevant
> > as it is not in the same layer as the other three. With this vision,
there
> > is a single dependency, namely of 1 on 3. So 1 is delayed and applied
after
>
> Is 1 delayed or is 3 moved to the front? Reading this rule:
>
> 418.5d Whenever one effect depends on another, the independent one is
> applied first. If several dependent effects form a loop, or if none
> depends on another, they're applied in "timestamp order."
>
> I'd think 3 is applied first and then 1 and 2.

I had asked about this very topic a loooong time ago (may 2002) and had been
answered that dependent effects were delayed. This may have changed since.
Note that either way 3 is applied first.
 
Archived from groups: rec.games.trading-cards.magic.rules (More info?)

>> I had asked about this very topic a loooong time ago (may 2002) and had
been
>> answered that dependent effects were delayed. This may have changed
since.
>> Note that either way 3 is applied first.
>
> No, the other way 2 is applied first and the difference is wether
> black creatures gain fear before they lose it or lose fear before they
> gain it.

Indeed there is obviously a difference. I don't know what I was thinking.

Christophe
 
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"David DeLaney" <dbd@gatekeeper.vic.com> a écrit dans le message de
news:slrncl3uhr.ag4.dbd@gatekeeper.vic.com...
> Christophe Dehlinger <dehlinger@evc.net> wrote:
> >Well, that was the vision I was hoping for :) . I haven't been looking
into
> >this with actual cards, but don't these sometimes "unwarranted"
dependencies
> >create counter-intuitive results ? For example, if we throw an extra
effect
> >into the mix :
> >1) All black creatures gain fear
> >2) All creatures lose fear
> >3) All creatures are black in addition to their other colors
> >4) Replace "black" with "blue" in the ability generating 3)
>
> (Sleight of Mind, in other words)
>
> >1,2 and 3 are listed in timestamp order, 4's timestamp should be
irrelevant
> >as it is not in the same layer as the other three.
>
> Right; it's down in layer 3, the others are up in 5.
>
> >With this vision, there is a single dependency, namely of 1 on 3.
>
> Well ... it's a potential dependency. In this case it's _not_ a
dependency,
> because when you look at the effects when you get to layer 5, 3 doesn't
> change anything 1 depends on. Contrast this to without-the-Sleight, where
> it -is- a dependency.
>
> >Also note that the variant you hinted at, namely applying effects of the
> >previous layers before checking for dependencies in the current layer,
makes
> >the above example work correctly.
>
> Right. Which is what the rules do say to do - things can only depend on
each
> other if they're in the same layer. (If they're in different layers, one
is
> ALWAYS applied before the other, no matter what it may change or the other
> may look for. Thus "All green creatures get +1/+1" does NOT technically
> depend on "All creatures are green", because the former is layer 6 while
> the latter is layer 5, and you can't "swap their order".)

I don't really see your point here. There was never a question of an effect
on layer 5 depending on an effect in layer 3, it was that the existence of a
dependency between two effects on layer 5 depends on an effect in layer 3.
The question is : given a layer n, as effects on layers <n affect the
dependencies within n, what information is taken into account when
determining the dependencies in n, and in particular which effects are
applied before determining them ? The comprehensive rules are quite clear as
to the role of the layers and more generally to what to take into account
when computing the _values_ of characteristics, but not so much when
determining dependencies, as they do not precise in what context the test
should be made.

Anyway, I guess I misunderstood your previous post. When you wrote:
> That's one of the great not-very-talked about questions of timestamp/
> dependency. I -prefer- to think of effects as depending on each other or
> not, independent of what other effects MIGHT be affecting them or what
> permanents may or may not be in play.
you also meant "...but dependent of the other effects that are _known_ to be
applied before the considered effects, such as effects of previous layers",
right ? This would mean that the variant I mentioned is actually what you
describe here.
What I had originally understood was that there was no distinction between
potential and actual dependencies. Thus, dependencies could be determined
outside the game : Hidden Path would always depend on Darkest Hour,
regardless of the game state.


Christophe
 
Archived from groups: rec.games.trading-cards.magic.rules (More info?)

Christophe Dehlinger <dehlinger@evc.net> wrote:

> The question is : given a layer n, as effects on layers <n affect the
> dependencies within n, what information is taken into account when
> determining the dependencies in n, and in particular which effects are
> applied before determining them ?

Keep in mind that layers 1 (and sometimes 3) tends to add or remove
rules text entirely. You do not have the option of ignoring that when
looking at later layers.
--
Daniel W. Johnson
panoptes@iquest.net
http://members.iquest.net/~panoptes/
039 53 36 N / 086 11 55 W
 
Archived from groups: rec.games.trading-cards.magic.rules (More info?)

Christophe Dehlinger <dehlinger@evc.net> wrote:
>I don't really see your point here. There was never a question of an effect
>on layer 5 depending on an effect in layer 3,

There seemed to be one given. Sorry if I misinterpreted.

>it was that the existence of a
>dependency between two effects on layer 5 depends on an effect in layer 3.
>The question is : given a layer n, as effects on layers <n affect the
>dependencies within n, what information is taken into account when
>determining the dependencies in n, and in particular which effects are
>applied before determining them ?

_Given_ the layers, you can pretty much assume a 'background' of "all the
layers below the one you're looking at have been applied already". Which can,
for layers 1,2,3,4, change what exists in later layers or what the existing
effects say or do.

>The comprehensive rules are quite clear as
>to the role of the layers and more generally to what to take into account
>when computing the _values_ of characteristics, but not so much when
>determining dependencies, as they do not precise in what context the test
>should be made.

Well, you can't -ignore- already-applied effects, that pretty much leads to
totally unintuitive and incorrect results ("I Sleight the Crusade to say
'blue', but it still checks only white creatures?")... and you can't ignore
things in the same layer, because that's what you're checking -for- dependency.
But how to construct the 'background' - do you include all the effects in the
layer except the two you're looking at? only the ones you already (somehow)
know aren't dependent on either one? only effects from previous layers? - all
the ways to do it have -some- flaw or other, and have one or more people who
are against doing it that way.

>Anyway, I guess I misunderstood your previous post. When you wrote:
>> That's one of the great not-very-talked about questions of timestamp/
>> dependency. I -prefer- to think of effects as depending on each other or
>> not, independent of what other effects MIGHT be affecting them or what
>> permanents may or may not be in play.

>you also meant "...but dependent of the other effects that are _known_ to be
>applied before the considered effects, such as effects of previous layers",
>right?

Right. I think. As you note, the layers actually divide the dependency
question into six separate subquestions (some of which are trivial in many
situations), taken in order...

>What I had originally understood was that there was no distinction between
>potential and actual dependencies. Thus, dependencies could be determined
>outside the game : Hidden Path would always depend on Darkest Hour,
>regardless of the game state.

That's what I'd like to be the case. But there are features of that that
others are unhappy with, or argue against, including the fact that it gives
-too many- dependencies. More precisely, I'd like there to be a potential
dependency there, but also that you check whether there is an -actual-
dependency there before trying to order stuff. (In this case stuff from
a lower layer can 'enable' the potential dependency - or stuff in this
layer, say "All black creatures are also green", could. But in either case
there's another effect needed to drive the potential to actual, whereas
there's no intermediary needed for Darkest Hour / Reclamation [though an
intermediary can -remove- their dependency by changing a color word on one
or the other...].)

Dave
--
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It's not the clock that slows the hour The definition's plain for anyone to see
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