http://en.wikipedia.org/wiki/Reductio_ad_absurdum
"Reductio ad absurdum (...) is a common form of argument which seeks to demonstrate that a statement is true by showing that a false, untenable, or absurd result follows from its denial, or in turn to demonstrate that a statement is false by showing that a false, untenable, or absurd result follows from its acceptance."
It follows from Einstein's 1905 constant-speed-of-light postulate that unlimitedly long objects can be trapped inside unlimitedly short containers, and that during the trapping the objects undergo compression and do not undergo compression at the same time:
http://en.wikipedia.org/wiki/Ladder_paradox
"The simplest version of the problem involves a garage, with a front and back door which are open, and a ladder which, when at rest with respects to the garage, is too long to fit inside. We now move the ladder at a high horizontal velocity through the stationary garage. Because of its high velocity, the ladder undergoes the relativistic effect of length contraction, and becomes significantly shorter. As a result, as the ladder passes through the garage, it is, for a time, completely contained inside it. We could, if we liked, simultaneously close both doors for a brief time, to demonstrate that the ladder fits."
http://www.einsteins-theory-of-relativity-4engineers.com/images/Ladder_paradox_garage_irf1.png
http://www.youtube.com/watch?v=uQHPAeiiQ3w
"How fast does a 7 m long buick need to go to fit in a 2 m deep closet?"
http://math.ucr.edu/home/baez/physics/Relativity/SR/barn_pole.html
"These are the props. You own a barn, 40m long, with automatic doors at either end, that can be opened and closed simultaneously by a switch. You also have a pole, 80m long, which of course won't fit in the barn. (...) If it does not explode under the strain and it is sufficiently elastic it will come to rest and start to spring back to its natural shape but since it is too big for the barn the other end is now going to crash into the back door and the rod will be trapped IN A COMPRESSED STATE inside the barn."
http://www.quebecscience.qc.ca/Revolutions
Stéphane Durand: "Ainsi, une fusée de 100 m passant à toute vitesse dans un tunnel de 60 m pourrait être entièrement contenue dans ce tunnel pendant une fraction de seconde, durant laquelle il serait possible de fermer des portes aux deux bouts! La fusée est donc réellement plus courte. Pourtant, il n'y a PAS DE COMPRESSION matérielle ou physique de l'engin."
The long-object-trapped-inside-short-container result is obviously absurd, therefore Einstein's 1905 constant-speed-of-light postulate is false.
Pentcho Valev