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Apr 24, 2015 at 21:01 vote accept Xeoncross
Jul 26, 2013 at 17:03 comment added Xeoncross @MichaelBrown, "But if time itself is changing, meaning that all clocks are affected equally, then there are no observable consequences and this is philosophy not physics." <- this is a big part of my question.
Jul 26, 2013 at 5:01 history closed Dilaton
user10851
user4552
Qmechanic
Needs details or clarity
Jul 26, 2013 at 3:14 comment added Michael "Might it have been relative in the past / present / future?" Relative to what?? In order for something to be relative it must be relative to some other thing. That is what "relative" means. And what about time is supposed to be relative? The rate that time goes by, as measured by some clocks? If so then you need some other more constant clock to compare to. If there is a difference you could attribute it to one clock being bad. But if time itself is changing, meaning that all clocks are affected equally, then there are no observable consequences and this is philosophy not physics.
Jul 26, 2013 at 2:19 history edited Waffle's Crazy Peanut CC BY-SA 3.0
Added cosmology tag: the valid part of this question seems to be the status of variability of $c$; added 4 characters in body
Jul 26, 2013 at 1:51 comment added Selene Routley Dear Xeoncross, I've added the cosmology tag to your question because, as I explain in my answer, I believe the meaningful part of your question is tantamount to saying how incomplete is the description GR gives of the Universe. The discussion of the limitations to GR is a very specialised branch of physics.
Jul 26, 2013 at 1:33 review Suggested edits
Jul 26, 2013 at 2:19
Jul 26, 2013 at 1:25 answer added Selene Routley timeline score: 2
S Jul 25, 2013 at 23:40 history suggested NeutronStar CC BY-SA 3.0
Spelling corrections/added tag
Jul 25, 2013 at 21:17 comment added user4552 We seem to measure time by using the speed of light. This is not true. For example, a pendulum clock has nothing to do with light.
Jul 25, 2013 at 19:40 review Close votes
Jul 26, 2013 at 5:01
Jul 25, 2013 at 19:31 comment added Qmechanic Comment to the question (v1): Are you essentially asking if the speed of light $c$ in vacuum could have been different in the past?
Jul 25, 2013 at 19:13 review Suggested edits
S Jul 25, 2013 at 23:40
Jul 25, 2013 at 18:50 history asked Xeoncross CC BY-SA 3.0