Luis De Pippo said:
Then why the different wording in the feats description? While not say that you can create any scroll, potion or wands whose prerequisites you meet?
Because scrolls, potions, and wands are all spell completion or spell trigger items; they never have non-spell prerequisites. Rods, wondrous items, and staves (such as a Staff of Power)
do sometimes have other prerequisites.
Luis De Pippo said:
The different wording means that they have different rules.
No. "It is possible for more than one character to cooperate in the creation of a magic item,
but not if the item is a scroll, potion, or wand" would mean they have different rules.
Note that Craft Magic Arms and Armor, Craft Rod, Craft Staff, and Craft Wondrous Item all say you can create any magic item "whose prerequisites
you meet," yet you seem to recognize that doesn't mean
only the creator can provide those prerequisites. Why, then, do you insist that
only the creator must know the spell "that you know" to create scrolls, potions, or wands?
Luis De Pippo said:
And a particular rule can trump a general rule, as it usually is more limited in a scope that a general one.
The fact that you recognize this makes it all the more baffling that you don't recognize how the particular rule for cooperating to create magic items trumps the general rule that the creator must provide the prerequisites (whether that prerequisite is "knows the spell required" or "has the feat required" or "has the necessary number of skill ranks" or whatever).
Luis De Pippo said:
Returning to creating magical items as I read the section on prerequisites I note that you need certain things to create a magic item:
1) Feat
2) Enough caster level to make it work
3) the necessary spells
4) Some extra requeriment (must be a dwarf, must be a sorcerer, etc).
This is were scrolls, potions and wands are different. They do not need a fixed caster level as the creator chooses which caster level to use.
How is that different? The caster level of a wondrous item is no more "fixed" than that of a wand. The creator can set it at any level sufficient to meet the prerequisites given (and no higher than his own)...just like he can with a scroll, potion, or wand.
Luis De Pippo said:
The rules also say that you can only use scrolls of those spells that are in your list, but you can create scroll of any list, provided you have another caster? It does not make sense from a rules point of view, but it also does not make sense from the world point of view.
Under your interpretation, it "does not make sense" that two casters could cooperate to craft a wand (spell trigger item) of a spell that is not on the spell list of the caster with the Craft Wand feat...but they
could cooperate to craft a staff (also a spell trigger item) with spells that are not on the spell list of the caster with the Craft Staff feat, because the Craft Wand feat says "any 4th-level or lower spell that you know," but Craft Staff says "any staff whose prerequisites you meet"?
That is what doesn't make sense, my friend.