Let's say I have a character with the aspect "The moon brings out my primal fury," and the environment has an aspect called "Full Moon." Would you allow that character to invoke both aspects to do virtually the same thing (such as modify the same brutal claw attack)?
It seems odd, because the Full Moon aspect might do nothing on its own, but it seems like it can interact with the other aspect to do something it doesn't normally do.
For an alternate example with possibly more meaning, let's say you're in a dungeon that has the "dim torch-light" aspect, but your character also has the "I can manipulate the flame" aspect. Which aspects can be invoked, and how, if your character says "I want to telekinetically throw torch flame at an enemy?"