Richard Feynman: "A very interesting example of the slowing of time with motion is furnished by muons, which are particles that disintegrate spontaneously after an average lifetime of 2×10^(−6) sec. They come to the earth in cosmic rays, and can also
be produced artificially in the laboratory. Some of them disintegrate in midair, but the remainder disintegrate only after they encounter a piece of material and stop. It is clear that in its short lifetime a muon cannot travel, even at the speed of
light, much more than 600 meters. But although the muons are created at the top of the atmosphere, some 10 kilometers up, yet they are actually found in a laboratory down here, in cosmic rays. How can that be? The answer is that different muons move at
various speeds, some of which are very close to the speed of light. While from their own point of view they live only about 2 μsec, from our point of view they live considerably longer - enough longer that they may reach the earth." http://www.
feynmanlectures.caltech.edu/I_15.html

Einsteinians call 2×10^(−6) sec "lifetime of muons at rest". Actually, this is the postcatastrophic lifetime of muons that have crashed into the detector at a speed close to the speed of light and naturally disintegrate faster than muons in flight (
similarly, the postcatastrophic lifetime of car drivers "at rest" is shorter than the lifetime of drivers in motion):

"The lifetime of muons at rest [...] Some of these muons are stopped within the plastic of the detector and the electronics are designed to measure the time between their arrival and their subsequent decay. The amount of time that a muon existed before
it reached the detector had no effect on how long it continued to live once it entered the detector. Therefore, the decay times measured by the detector gave an accurate value of the muon's lifetime. After two kinds of noise were subtracted from the data,
the results from three data sets yielded an average lifetime of 2.07x 10^(-6)s, in good agreement with the accepted value of 2.20x 10^(-6)s." http://cosmic.lbl.gov/more/SeanFottrell.pdf

"In order to measure the decay constant for a muon at rest (or the corresponding mean-life) one must stop and detect a muon, wait for and detect its decay products, and measure the time interval between capture and decay. Since muons decaying at rest are
selected, it is the proper lifetime that is measured. Lifetimes of muons in flight are time-dilated (velocity dependent), and can be much longer..." https://www.scribd.com/document/266379869/Muon-Rutgers

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Another idiotic "confirmation" of Einstein's relativity was devised by Alväger and is cited by Einsteinians as "unambiguous":

Michael Fowler, University of Virginia: "There is another obvious possibility, which is called the emitter theory: the light travels at 186,300 miles per second relative to the source of the light. The analogy here is between light emitted by a source
and bullets emitted by a machine gun. The bullets come out at a definite speed (called the muzzle velocity) relative to the barrel of the gun. If the gun is mounted on the front of a tank, which is moving forward, and the gun is pointing forward, then
relative to the ground the bullets are moving faster than they would if shot from a tank at rest. The simplest way to test the emitter theory of light, then, is to measure the speed of light emitted in the forward direction by a flashlight moving in the
forward direction, and see if it exceeds the known speed of light by an amount equal to the speed of the flashlight. Actually, this kind of direct test of the emitter theory only became experimentally feasible in the nineteen-sixties. It is now possible
to produce particles, called neutral pions, which decay each one in a little explosion, emitting a flash of light. It is also possible to have these pions moving forward at 185,000 miles per second when they self destruct, and to catch the light emitted
in the forward direction, and clock its speed. It is found that, despite the expected boost from being emitted by a very fast source, the light from the little explosions is going forward at the usual speed of 186,300 miles per second. In the last
century, the emitter theory was rejected because it was thought the appearance of certain astronomical phenomena, such as double stars, where two stars rotate around each other, would be affected. Those arguments have since been criticized, but the pion
test is unambiguous. The definitive experiment was carried out by Alvager et al., Physics Letters 12, 260 (1964)." http://galileoandeinstein.physics.virginia.edu/lectures/michelson.html

Here is Alväger's paper:

Test of the second postulate of special relativity in the GeV region, Alväger, T.; Farley, F. J. M.; Kjellman, J.; Wallin, L., 1964, Physics Letters, vol. 12, Issue 3, pp.260-262 https://www.sciencedirect.com/science/article/pii/0031916364910959

High energy particles bump into a beryllium target. As a result, gamma photons leave the target and travel at c relative to the target. Antirelativists do not see how this can refute the emission theory but Einsteinians do. They teach that initially a
pion is generated inside the beryllium target and this pion travels at 0.9999c inside the target. It decays into two gamma photons inside the target and therefore this pion is a moving source of light. And since the source travels at c inside the target,
the gamma photons must travel at 2c if the emission theory is correct. But they don't - they travel at c.

If the emission theory had predicted that the products of the disintegration of a particle continue with a speed twice as great as the speed of the particle, it would be the silliest theory in the history of science. The straw man built by Alväger & Co
is obviously idiotic, and yet the experiment is cited as most convincing, "unambiguous" confirmation of Einstein's 1905 constant-speed-of-light postulate.

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