That clock ticking on the wall seems pretty real. And it had to start sometime. Time can last forever but it needs a start. Of course it can restart infinite times.

That clock ticking on the wall seems pretty real. And it had to start sometime. Time can last forever but it needs a start. Of course it can restart infinite times. — Raymond

If you say so.

How can time have no beginning? There should be initial çonditions to arrive at the present. We already know that matter is not constantly created. Wouldn't an infinite past imply a dead present?

Are there two kinds of time maybe, one reversible and one irreversible? The irreversible exploding from the reversible?

1. if the universe was temporally infinite, then there would be no 1st moment
2. if there was no 1st moment, then there was no 2nd moment
3. if there was no 2nd moment, then there was no 3rd moment
4. ... and so on and so forth ...
5. ... then there would be no now
6. since now exists, we started out wrong, i.e. the universe is not temporally infinite — jorndoe

"now" doesn't identify a moment relative to a temporal series. Indeed you do not need to know the timestamp of the current moment, to know that is now. This is to say that no counting from a "first moment" will ever reach a "now" even if the past temporal series was finite, unless one already knows what now is. On the other side one can count a series of temporal events starting from the moment identified as now. So the logic of "now" doesn't provide any evidence that the past/future temporal series are finite, on the contrary it admits that possibility (since one can count from now to the past or to the future indefinitely).