At 06:58 AM 12/17/2010, Carlos wrote:
Don: I could copy definitions, every viewpoints, etcetera from different sources, but I think it would be more easy to read this Wikipedia article: http://en.wikipedia.org/wiki/Time Carlos
Yes, I have read that entry and in the first paragraph it says: "Time has been a major subject of <http://en.wikipedia.org/wiki//wiki/Religion>religion, <http://en.wikipedia.org/wiki//wiki/Philosophy>philosophy, and <http://en.wikipedia.org/wiki//wiki/Science>science, but defining it in a non-controversial manner applicable to all fields of study has consistently eluded the greatest scholars."
----------I just noticed the above incomplete response on the subject. I had been holding this message in order to find a statement by Einstein, that he couldn't define time, but it's buried somewhere in a 400 page bio I have been reading and I can't easily find that sentence. Just trust me that he did say that.
Einstein even used time as a fourth dimension, and also attempted to prove that the universe is curved back on itself. Current evidence now points to a flat universe. He even won a Nobel Prize in Physics, but not for his work on relativity.
Interesting situation, Hawking wrote a Brief History of Time, but even there he didn't define the term.
It's clear that even though there seems to be no scientific definition of time, we all use it, mutually understand what the word means, and are not hampered in our daily lives by the lack of such definition.