The point is, how do you know the Guarantee Fairy isn't a crazy glue sniffer.

How do you know you're going to do something, untill you do it?

What is your identity, and how do you know who you are if you don't have language?

If you aren't in over your head, how do you know how tall you are?

I stuck with a mustache because... do you know Magnum P.I.?

What do you know? Haven't you heard of suspension of disbelief?