Time is a dimension, no differerent than any other we perceive, though we perceive it differently.

BP, to challenge the concept of 'time' is to challenge existence itself. You might be able to argue semantics and claim that it is not defined properly. But the fundamental concept, life is a movie, not a snapshot, is fundamental. How can you possibly argue for existence period if you cannot allow for time?

I think it's good that you try so hard to develop theories based on pure reason, but at some point, you're going to need a healthy dose of empiricism. There are simple data you can observe, make predictions about and confirm or deny your guesses on. You are right, at the end of the day, all could be explained by a deluded mind that exists singularly and creates time to prevent itself from going insane (as well as all experienced phenomenon that display chronolgical characteristics).

But what would be the point? You're driving towards a nihilism that nihilists themselves do not dare tread into. Why bother to tap your toughts and observations into that imaginary little keyboard? Why write messages to imaginary friends across the internet, or even speak to imaginary diversions in 'real life' for that matter? At the end of the day, existence, and meaning of said existence, are a choice. We matter because we choose to. At the end of the day, it really is that simple. To follow this path of 'pure reason' and 'nothing exists except my thoughts' may very well be true, but if it is, what possible point could it serve to make yourself aware of such a truth? If existence is truly meaningless and absurd, why exist?