Blatantly lying Einsteinians:

"In his famous paper on special relativity in 1905, Albert Einstein deduced that when two clocks were brought together and synchronized, and then one was moved away and brought back, the clock which had undergone the traveling would be found to be lagging behind the clock which had stayed put." https://en.wikipedia.org/wiki/Twin_paradox

In 1905 the moving clock was one-way (it was not "brought back"):

Albert Einstein, 1905, On the Electrodynamics of Moving Bodies: "From this there ensues the following peculiar consequence. If at the points A and B of K there are stationary clocks which, viewed in the stationary system, are synchronous; and if the clock at A is moved with the velocity v along the line AB to B, then on its arrival at B the two clocks no longer synchronize, but the clock moved from A to B lags behind the other which has remained at B..." http://www.fourmilab.ch/etexts/einstein/specrel/www/

Here is an animation that corresponds to Einstein's 1905 one-way clock scenario:

https://youtu.be/Q1y3YnPgaY4?t=1157

So things are more than clear: In 1905 Einstein fraudulently "deduced" ASYMMETRIC time dilation (the moving clock is slow, the stationary one is fast), knowing that his postulates entailed SYMMETRIC time dilation (either clock is slow as judged from the other clock's system).

Asymmetric time dilation, the non sequitur, was able to produce breathtaking predictions (e.g. the youthfulness of the traveling twin) while symmetric time dilation, the valid deduction from the postulates, was just a sterile (in terms of predictions) absurdity.

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