Originally Posted by Jay R
It's an interesting idea, and could have some intriguing unintended consequences. If I were running a game under this assumption, it would affect what a Limited Wish could do, based on who was casting it.
If an Evocation specialist asked for a magic sword, then there would be one more magic sword in the world. If a conjuror asked for it, then she would get it, but a sword would disappear somewhere else in the world. (The original owner might eventually seek out the conjuror who stole his sword.)
Presumably, a Limited Wish from an Evocation wizard would not be able to take the party to safety. (But it might create a magic item that could be used to Teleport.)
The Summoner could produce a scroll with any spell that already existed, but couldn't use it to create a new spell that nobody in the world knew yet.
I might use it to determine in what way the wish was limited. Something conjured might eventually be conjured back by its original owner. Something created might be less than (or different from) what was expected.
Actually typically anything created outside of energy was generally considered conjuration whereas bringing an already created thing to you was summoning though both were under the same school. One odd thing was that teleportation was alteration back in 2e if I recall correctly and not conjuration as it is in 3e.