The following text, per se, exposes Einstein's relativity as an absurdity:

"Twin A stays on the earth, while twin B flies quickly to a distant star and back. [...] For the entire outward and return parts of the trip, B does observe A's clock running slow..." David Morin, Introduction to Classical Mechanics With Problems and Solutions, Chapter 11, p. 14 http://www.people.fas.harvard.edu/~djmorin/chap11.pdf

That is, all along, A observes B's clock running slow and B observes A's clock running slow so when A and B meet again either twin finds the other younger than himself. Idiotic isn't it?

How can Einstein's relativity be saved? Some additional idiocy will have to be introduced, able to neutralize the original idiocy. In 1918 Einstein informed the gullible world that, during the turning-around acceleration, a HOMOGENEOUS gravitational field appears:

Albert Einstein: "A homogeneous gravitational field appears..." http://sciliterature.50webs.com/Dialog.htm

David Morin (quoted above) finds Einstein's homogeneous gravitational field too idiotic - he has replaced it with "enough strangeness" which sounds less idiotic to him:

"Twin A stays on the earth, while twin B flies quickly to a distant star and back. [...] For the entire outward and return parts of the trip, B does observe A's clock running slow, but enough strangeness occurs during the turning-around period to make A end up older."

Pentcho Valev