While true, it's also nonsensical to ask people to believe in something without providing evidence of it.
Carl Sagan has a good short story to this effect about a dragon in his garage: http://people.whitman.edu/~herbrawt/classes/110/Sagan.pdf
> Now, what's the difference between an invisible, incorporeal, floating dragon who spits
heatless fire and no dragon at all? If there's no way to disprove my contention, no conceivable experiment that would count against it, what does it mean to say that my dragon exists? Your inability to invalidate my hypothesis is not at all the same thing as proving it true. Claims that cannot be tested, assertions immune to disproof are veridically worthless, whatever value they may have in inspiring us or in exciting our sense of wonder. What I'm asking you to do comes down to believing, in the absence of evidence, on my say-so. The only thing you've really learned from my insistence that there's a dragon in my garage is that something funny is going on inside my head.
