The universe appears "old", but it is still less than 10,000 years old

[Anomalocaris]

The measurements are being recorded in one position, yes. But the detectors that are relaying that information are in different positions. The information still has to be relayed back to the oscilloscope.

The measurements are being recorded in two positions separated by 1,000 feet. The signal from each detector is running along identical wires with identical lengths with known properties. The issue is synchroneity of clocks, NOT synchroneity of detectors. That isn't an issue here because there is only one clock measuring arrival times at each detector. You don't actually want synchroneity of detectors and wouldn't expect to have it because you are trying to measure the arrival times of the laser light at each detector. The measurement is a one-way measurement from the source (the laser) to the two detectors set at different locations along the light path. You know the speed at which the signal will reach the oscilloscope from each detector (from prior testing) and used that information to calibrate your result.

Anyone who could argue, based on no evidence whatsoever, that photons as near identical as could be determined, traversing two otherwise indistinguishable linear stretches of space, could nonetheless do so at different velocities just so as to save the bible, can also argue electrical signals as near identical as could be determined, traversing two otherwise indistinguishable wires, could nonetheless travel at different speeds on those occassions where such difference appears to them to be necessary to saving the bible.