Icarus
Why would the measuring instruments "change"? wouldn't that defy your second postulate?
If the speed of light only "appeared" to be constant then there would be no problem with the absolutness of time. The fact that the speed of light
is the same with respect to two observers in different inertial frames leads us to the conclusion that the two observers do not share the same time scale hence time travel. Also isn't the speed of light in a vacuum near as damn it the same in air?
Howzat? Maybe I'm wrong - I look forward to your reply
