Sounds like one of the central tenants of discordianism. There is no such thing as wings, identity, truth, the concept of equality. These are all abstract concepts that exist only in the mind. "Out there" in "True" reality, there is only chaos (not necessarily of the random kind, just of the meaningless/purposeless kind).
It's fun reading through the comments and immediately seeing with little difficulty, which people were told as kids (or have told their kids or will tell their kids) about santa clause (and conversely those which weren't, didn't, and won't).
Seems to me that there's a lot of rationalization going on around this touchy subject from all sides.
I wasn't told the santa myth and I don't plan on teaching it to my kids either. I'm probably biased, but that seems right to me. If truth can destroy a thing, then it should.
And Kaj Sotala, I think the point being made by that part is that there are plenty of things in the world that are true that will instill wonder. To continue your argument: tell kids about santa AND give them science fiction AND take them to a shuttle launch AND tell them about invisible pink unicorns that watch over you at carnivals.
If you're going to allow fictional information to be presented as true for the sake of "creating wonder", why stop at santa? Why stop at culturally accepted fictions even? Why not create new ones as well? Or you could pull from other cultures too.
I suspect that it's one of those things where if you experienced it as a child, then it SHOULD be a part of childhood.
"Adjectives like probable and possible do not apply to them; they are not beliefs or sentences or possible worlds. They are not true or false but simply real."
Based on all the "i"s in the equations I think you meant to say "complex" =p