John Norton, the subtlest practitioner of doublethink in Einsteiniana,
informs believers that Maxwell's theory violates the principle of
relativity while Newton's emission theory of light does not:

http://www.pitt.edu/~jdnorton/papers/Chasing.pdf
John Norton: "In Maxwell's theory, a light wave in a vacuum always
propagates at the same speed, c, with respect to the ether. So
measuring the speed of a light beam gives observers an easy way to
determine their motion in the ether. If they find the light to move at
c, the observers are at rest in the ether. If they find the light
frozen, they are moving at c in the ether. Since observers can
determine their absolute motion, the theory violates the principle of
relativity. The alternative theory that Einstein began to pursue was
an "emission theory." In such a theory, the speed of light in vacuo is
still c. But it is not c with respect to the ether; it is c with
respect to the source that emits the light. In such a theory,
observing the speed of a light beam tells observers nothing about
their absolute motion. It only reveals their motion with respect to
the source that emitted the light. If they find the beam to propagate
at c, the observers are at rest with respect to the emitter. If they
find the beam to be frozen, they are fleeing from the source at c. In
general, observers can only ascertain their relative velocity with
respect to the source."

http://www.liferesearchuniversal.com...html#seventeen
George Orwell: "Doublethink means the power of holding two
contradictory beliefs in one's mind simultaneously, and accepting both
of them. The Party intellectual knows in which direction his memories
must be altered; he therefore knows that he is playing tricks with
reality; but by the exercise of doublethink he also satisfies himself
that reality is not violated. The process has to be conscious, or it
would not be carried out with sufficient precision, but it also has to
be unconscious, or it would bring with it a feeling of falsity and
hence of guilt. Doublethink lies at the very heart of Ingsoc, since
the essential act of the Party is to use conscious deception while
retaining the firmness of purpose that goes with complete honesty. To
tell deliberate lies while genuinely believing in them, to forget any
fact that has become inconvenient, and then, when it becomes necessary
again, to draw it back from oblivion for just so long as it is needed,
to deny the existence of objective reality and all the while to take
account of the reality which one denies - all this is indispensably
necessary. Even in using the word doublethink it is necessary to
exercise doublethink. For by using the word one admits that one is
tampering with reality; by a fresh act of doublethink one erases this
knowledge ; and so on indefinitely, with the lie always one leap ahead
of the truth. (...) It need hardly be said that the subtlest
practitioners of doublethink are those who invented doublethink and
know that it is a vast system of mental cheating. In our society,
those who have the best knowledge of what is happening are also those
who are furthest from seeing the world as it is. In general, the
greater the understanding, the greater the delusion ; the more
intelligent, the less sane."

Pentcho Valev