If two clocks are initially stationary and synchronized but then one moves towards and finally meets the other, either clock will see the other lagging behind.

The conclusion is validly deducible from the postulates but is obviously absurd, which shows that at least one of the postulates is false (reductio ad absurdum). So if Einstein had obeyed logic in 1905, Max Planck would not have found courage to publish his paper.

Einstein fraudulently tweaked the conclusion and camouflaged the absurdity. Here is the tweaked version:

If two clocks are initially stationary and synchronized but then one moves towards and finally meets the other, the stationary clock will see the moving clock lagging behind while the moving clock will see the stationary running fast.

And the fraudulent text:

Albert Einstein, On the Electrodynamics of Moving Bodies, 1905: "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 by tv^2/2c^2 (up to magnitudes of fourth and higher order), t being the time occupied in the journey from A to B." http://www.fourmilab.ch/etexts/einstein/specrel/www/

The tweaked version is clearly non sequitur - it doesn't follow from Einstein's 1905 postulates. Still it became Einstein's "my precious", for two reasons:

1. It doesn't sound absurd.

2. It entails TIME TRAVEL INTO THE FUTURE - the miracle (more precisely, idiocy) that converted Einstein into a deity:

"The paradigm of the special relativistic upheaval of the usual concept of time is the twin paradox. Let us emphasize that this striking example of time dilation proves that time travel (towards the future) is possible. As a gedanken experiment (if we neglect practicalities such as the technology needed for reaching velocities comparable to the velocity of light, the cost of the fuel and the capacity of the traveller to sustain high accelerations), it shows that a sentient being can jump, "within a minute" (of his experienced time) arbitrarily far in the future, say sixty million years ahead, and see, and be part of, what (will) happen then on Earth. This is a clear way of realizing that the future "already exists" (as we can experience it "in a minute")." http://www.bourbaphy.fr/damourtemps.pdf