Lee Smolin and Joao Magueijo are primitive (silly) doublethinkers. They theatrically bash Einstein in their bestseller campaigns but the rest of the time make money and career by quietly singing "Divine Einstein" and "Yes we all believe in relativity, relativity, relativity":
https://www.amazon.ca/Faster-Than-Speed-Light-Speculation/dp/0738205257
Joao Magueijo, Faster Than the Speed of Light, p. 250: "Lee [Smolin] and I discussed these paradoxes at great length for many months, starting in January 2001. We would meet in cafés in South Kensington or Holland Park to mull over the problem. THE ROOT OF ALL THE EVIL WAS CLEARLY SPECIAL RELATIVITY. All these paradoxes resulted from well known effects such as length contraction, time dilation, or E=mc^2, all basic predictions of special relativity. And all denied the possibility of establishing a well-defined border, common to all observers, capable of containing new quantum gravitational effects."
The subtlest practitioner of doublethink in Einstein's schizophrenic world is undoubtedly John Norton:
"What happens when a light clock is set into rapid motion, close to the speed of light? It is easy to see without doing any sums that the light clock will be slowed down. That is, it will be slowed down in the judgment of someone who does not move with the light clock."
http://www.pitt.edu/~jdnorton/teaching/HPS_0410/chapters_2017_Jan_1/Special_relativity_clocks_rods/index.html
Here John Norton deals with the fundamental hoax of Einstein's relativity. He presents the statements
Statement 1: "the [moving] light clock will be slowed down"
and
Statement 2: "it will be slowed down in the judgment of someone who does not move with the light clock"
as equivalent. Rather, they contradict one another.
Statement 2 is an expression of SYMMETRICAL time dilation - a VALIDLY deducible consequence of Einstein's 1905 postulates. Symmetrical time dilation does not entail travel into the future.
Statement 1 is an expression of ASYMMETRICAL time dilation (the moving clock is slow, the stationary one is FAST) - Einstein INVALIDLY deduced it in 1905. The implications of asymmetrical time dilation are breathtaking - the slowness of the moving clock means that its (moving) owner can remain virtually unchanged while sixty million years are passing for the stationary system:
http://www.bourbaphy.fr/damourtemps.pdf
Thibault Damour: "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")."
Only John Norton can combine SYMMETRICAL and ASYMMETRICAL time dilation so boldly. Silly Einsteinians just teach ASYMMETRICAL time dilation:
http://www.jimal-khalili.com/blogs/
Jim Al-Khalili: "And, the faster you move and the longer you move at that speed, the slower your clock ticks, including your own internal biological clock, and so the slower you age - by tiny, tiny fractions of a second of course."
http://abcnews.go.com/Entertainment/back-future-30th-anniversary-neil-degrasse-tyson-talks/story?id=32191481
Neil deGrasse Tyson: "We have ways of moving into the future. That is to have time tick more slowly for you than others, who you return to later on. We've known that since 1905, Einstein's special theory of relativity, which gives the precise prescription for how time would slow down for you if you are set into motion."
https://www.youtube.com/watch?v=-O8lBIcHre0
Brian Cox (2:25) : "Moving clocks run slowly"
http://www.newscientist.com/article/mg13117878.000-a-special-theory-of-relativity.html
John Gribbin: "Einstein's special theory of relativity tells us how the Universe looks to an observer moving at a steady speed. Because the speed of light is the same for all such observers, moving clocks run slow..."
https://m.youtube.com/watch?v=QnmnLmwBmfE
Brian Greene: "If you're moving relative to somebody else, time for you slows down."
Pentcho Valev