Code Geass: Lelouch of the Rebellion R2

[shinta|hikari]

Not really. The reason why she looked dazed and confused is because it is a command to answer a question, and if you try to answer a question you do not know the answer to, that is exactly what will happen to you. If the fulfillment of the command is reasonably impossible but attempt is, the victim should still try will all their might. But if you mean commands that are simply impossible, like "fly" or "transform into a god-like mecha" then that daze effect will probably apply.

EDIT: I realize that the command "fly" may not apply, due to several reasons, but the second one is stll a good example for my point.