[so_real]

Disagree :-) We perceive time only because the future is revealed to us one moment at a time. Our perception is limited to that of a character inside the story. If our point of view were changed, so as to have the perception of the reader or the author of the story, we could view it front to back --- or peek at the last chapter to see how it all ends. Time is meaningless to a character outside the story line. It is an artificial construct imposed on creatures having limited senses.

[Lonesome in Massachussets]

You can only remember the past, not the future.

Entropy determines the arrow of time. Watch someone making the opening shot in a game of pool, breaking up the original triangle. No law of physics is violated by running the tape backwards, except that going backwards, entropy decreases and you can tell immediately that the tape is running backwards.

Same thing if you watch a plane crash. You can immediately recognize when the tape is going backwards.

[SoCal Pubbie]

I’ve always thought there is no such thing as time in the sense that there is mass or gravity. As you say, it’s something we perceive, but does not exist as it’s own thing. Then again, I’m not a physicist.