A matter of convenience would be to accept such speculation as truth, so we can remain comfortably in our chair. To learn the truth requires leaving our chair, climbing that wall and looking to see what's on the other side. Knowledge leads to truth, but it doesn't just drop into your lap, or your pool. You have to seek it out.
Yet, to be absolutely sure that something is true, you need something that is already known to be true, to support it. My point is that there are walls beyond the wall you first climb, and then more walls beyond that, and so on. I can search for knowledge, but when can I, if I ever can, be sure that what I have gathered around me is true?


It's like trying to reach a destination by traveling half the remaining distance each day. The longer you travel, the closer you get, but you can never truly arrive.
Absolute truth is the destination. The path is laid with broken perspectives and subjective truths. And you never reach the end. Something like Tantalus reaching for the apple that always moves beyond his reach.

Oh, and while you're at it, don't forget to get the poor SOB out of the pool!