Yes, that is a stupid question.

[Hon'ya-chan]

Customer: Can I ask you a stupid question?
Me: *hesitation* Okay....
Customer: Fiction....True or False?
Me: *silence for a moment* False.
*Customer leaves*

[Rivulatus]

There are no stupid questions, only stupid people.

[Mongo Skruddgemire]

There are no stupid questions but there are a lot of inquisitive idiots. - dispair.com

[Custard Chick]

At least he warned you ahead of time it was going to be stupid...

[Imogene]

Customer: Can I ask you a stupid question?

Too late...

[LibraryLady]

Yeah, that's almost as bad as the question I got some years ago.

"Is it true that the pyramids were built from the bottom up?"

[smileyeagle1021]

Yeah, that's almost as bad as the question I got some years ago.

"Is it true that the pyramids were built from the bottom up?"

i seriously think that the only way to answer that is to tell them that no in fact they were placed there by aliens...