do you not understand the concept of testing the passing of time?
start at 0. at point 60, you know that an hour has passed (if using minutes).
Throuhgout the day, twenty four hours pass. time has gone by. But how do we know this? well, we can look at the sun. in the morning it was in the east, it went down on the west. we can look at the moon. (i think it follows the same pattern as the sun, but as I never really pay attention to it). or better yet, you can look at how the moon changes. And realize from one night to the other, that, hey, it's different. we can look at your age. Do you dispute that x many years have passed since you were born? Do you dispute that the Roman empire was around 2000 years ago?
That's what all this stuff tests--the passage of time, how much time has gone by from point x to point y.
and if you dispute the passage of time, well, . . .
All a man's knowledge comes from his experiences