Originally Posted by: earthman buckBut then, who among us can? All we have to go on are our brains' perception of the 5 senses, and if those are screwed up, so is the universe, in the mind of the beholder.

I give these things a lot of thought.

Perceptions need to be tested, just like any other concept. We can't see air up close, but we get independant confirmation of it's existence via observations, and our other senses. Neurological research has shown a bit about how we process sensory input, but no one can yet say for sure that we all process the data in the same way. And anyone who has ever experimented with LSD can confirm that the processing pathways can arbitrarily cross-couple. It can be liberating. It can be terrifying. And to some extent, it is real.