Does time exist? Or, did it exist before the invention of the clock?
What is a clock measuring? Is it measuring anything?
All it is doing is making comparisons, “what was the duration of this compared to that?”
All actions, all processes, have duration. It is the infinite number of concurrent processes that give the impression of a constant consistent flow of time, but is time constant and consistent? Or are the variations in the way we experience time real?
If two identical clocks ‘tick’ at different rates due to the conditions they are subject to, then those ‘ticks’ are of different durations. Yet each is the duration of the same process and, as stated above, we use processes to define time.
So we could say that a process defines a certain amount of time but the magnitude of that time depends on the conditions under which that time was created …