I've been in a fly-on-the-wall position on a wide range or things from mental health to politics to mob activity and have the kind of perspective that comes from listening to politicians discuss upcoming elections for a couple of hours before realizing I have yet to hear the word 'votes'...
We live in an age where 'proof' is expected to consist of 'secret tapes' and 'exposed emails.' People without a knowledge of human nature or the ability to use real logic tend to be incapable of realizing that Heidinger's Cat is the best 'proof' you can expect from real life.
People instinctively understand this, to a degree. For example, if you speculate aloud that some young boys, when first learning of Superman's x-ray vision, will immediately think of the possibilities of seeing through young girl's clothing, I doubt anyone is going to demand that you provide 'proof' of the 'veracity' of your observation...