Jimmy wrote:

What is time? I think it is just in our minds. Have someone proved that time
exist outside our mind?

Thanks

The only thing I can think of is that entropy is always increasing, so
there is some fundamental thing that is always going forward. An example
I read in Hawking's book was that when a dish (I think) falls and breaks
it will always become more disordered, the reverse will never happen,
the dish will never jump off the floor and reconstruct itself.

So, based upon that, there has to be something that moves us forward. It
is odd, that time (whatever it is) is one of the few quantities that we
can't make negative (yet at least.)

As far defining it, the way we treat time is our own construction. We
could say that our current second is too short and double. So now, 1 new
minute = 120 old seconds. All of our days would be 12 old hours long or
whatever you want to call them. The numbers on our clocks and calendars,
are just a construct that was created for sake of use.

Just my thoughts, it's a very interesting subject.

Peter

The only thing I can think of is that entropy is always increasing, so
there is some fundamental thing that is always going forward. An example
I read in Hawking's book was that when a dish (I think) falls and breaks
it will always become more disordered, the reverse will never happen,
the dish will never jump off the floor and reconstruct itself.

So, based upon that, there has to be something that moves us forward.