Hey Sabine Hossenfelder, Please stop talking nonsense about relativity.

[Pentcho Valev]

http://backreaction.blogspot.bg/2016/03/hey-bill-nye-please-stop-talking.html
Sabine Hossenfelder: "Hey Bill Nye, Please stop talking nonsense about quantum mechanics. (...) Once you can send information faster than the speed of light, you can also send it back in time. If you can send information back in time, you can create inconsistent histories, that is, you can create various different pasts, a problem commonly known as "grandfather paradox:" What happens if you travel back in time and kill your grandpa? Will Marty McFly be born if he doesn't get his mom to dance with his dad? Exactly this problem."

This is much sillier than Bill Nye's wisdoms. Faster-than-light signaling does disprove Einstein's relativity but in a different way. In the example below, if the deactivation device is able to send a faster-than-light signal to the bomb, then special relativity ends up in a contradiction: the bomb explodes in the frame of the train but does not in the frame of the tunnel:

http://www.people.fas.harvard.edu/~djmorin/chap11.pdf
pp. 41-42: "11.6. Train in a tunnel. A train and a tunnel both have proper lengths L. The train moves toward the tunnel at speed v. A bomb is located at the front of the train. The bomb is designed to explode when the front of the train passes the far end of the tunnel. A deactivation sensor is located at the back of the train. When the back of the train passes the near end of the tunnel, the sensor tells the bomb to disarm itself. Does the bomb explode?"

There is a much easier way to disprove Einstein's relativity. The Doppler effect unequivocally shows that the speed of light is not constant:

http://www.einstein-online.info/spotlights/doppler
Albert Einstein Institute: "The frequency of a wave-like signal - such as sound or light - depends on the movement of the sender and of the receiver. This is known as the Doppler effect. (...) Here is an animation of the receiver moving towards the source:

http://www.einstein-online.info/images/spotlights/doppler/doppler_static.gif (stationary receiver)

http://www.einstein-online.info/images/spotlights/doppler/doppler_detector_blue.gif (moving receiver)

By observing the two indicator lights, you can see for yourself that, once more, there is a blue-shift - the pulse frequency measured at the receiver is somewhat higher than the frequency with which the pulses are sent out. This time, the distances between subsequent pulses are not affected, but still there is a frequency shift: As the receiver moves towards each pulse, the time until pulse and receiver meet up is shortened. In this particular animation, which has the receiver moving towards the source at one third the speed of the pulses themselves, four pulses are received in the time it takes the source to emit three pulses."

Since "four pulses are received in the time it takes the source to emit three pulses", the speed of the pulses relative to the receiver is greater than their speed relative to the source, in violation of Einstein's relativity.

Pentcho Valev

[Pentcho Valev]

http://motls.blogspot.bg/2016/03/hey-bill-nye-please-stop-talking.html
Luboš Motl: "As Einstein figured out in 1905 when he discovered the special theory of relativity, no information can ever propagate faster than the speed of light (in the vacuum) let alone instantaneously. If this were possible, the Lorentz symmetry – the right way to switch to the perspective of a different inertial observer – would allow us to describe the same causation as a sequence of events where the effect has preceded the cause. It's clearly impossible."

In their early education Sabine Hossenfelder and Luboš Motl were forced to repeat wisdoms of this kind until in the end both of them got the name Bingo the Einsteiniano:

https://www.youtube.com/watch?v=gX5ajyPr96M
Bingo (Chris Landreth, 1998)

A clear example of the conversion of normal people into thoughtless zombies: Initially Joe Wolfe's students are sure that the speed of light cannot be the same for differently moving observers but in the end all of them get the name Bingo the Einsteiniano:

http://www.phys.unsw.edu.au/einsteinlight/jw/module3_weird_logic.htm
Joe Wolfe: "At this stage, many of my students say things like "The invariance of the speed of light among observers is impossible" or "I can't understand it". Well, it's not impossible. It's even more than possible, it is true. This is something that has been extensively measured, and many refinements to the Michelson and Morely experiment, and complementary experiments have confirmed this invariance to very great precision. As to understanding it, there isn't really much to understand. However surprising and weird it may be, it is the case. It's the law in our universe. The fact of the invariance of c doesn't take much understanding."

Pentcho Valev

[Pentcho Valev]

Bingo the Einsteiniano teaches that Einstein's 1905 second (constant-speed-of-light) postulate is a consequence of the first (the principle of relativity):

http://webs.morningside.edu/slaven/Physics/relativity/relativity3.html
Dave Slaven: "Einstein's first postulate seems perfectly reasonable. And his second postulate follows very reasonably from his first. How strange that the consequences will seem so unreasonable."

One would expect this degree of silliness to be rare; actually it is commonplace among Bingos. Many of them fiercely teach the same wisdom:

https://www.youtube.com/watch?v=IjRSYv7u3T4
Professor Raymond Flood (5:05): "A consequence of Einstein's principle of relativity is that the speed of light in a vacuum has the same value in two uniformly moving frames of reference."

http://motls.blogspot.com/2006/12/lorentz-violation-and-deformed-special.html
Luboš Motl: "The second postulate of special relativity morally follows from the first one..."

http://www.forbes.com/sites/chadorzel/2015/05/29/four-reasons-to-not-fear-physics/
Chad Orzel: "The core idea of Einstein's theory of relativity can fit on a bumper sticker: The Laws Of Physics Do Not Depend On How You're Moving. Absolutely everything else follows from the simple realization that physics must appear exactly the same to person in motion as to a person at rest - the constant speed of light, the slowing of time for moving observers, E=mc2, black holes, even the expanding universe (I've written a whole book about this, explained through imaginary conversations with my dog)."

http://galileo.phys.virginia.edu/classes/109/lectures/spec_rel.html
Michael Fowler: "Therefore, demanding that the laws of physics are the same in all inertial frames implies that the speed of any light wave, measured in any inertial frame, must be 186,300 miles per second. This then is the entire content of the Theory of Special Relativity: the Laws of Physics are the same in any inertial frame, and, in particular, any measurement of the speed of light in any inertial frame will always give 186,300 miles per second."

http://arxiv.org/abs/gr-qc/9909081
Vesselin Petkov: "One of the fundamental facts of modern physics is the constancy of the speed of light. Einstein regarded it as one of the two postulates on which special relativity is based. So far, however, little attention has been paid to the status of this postulate when teaching special relativity. It turns out that the constancy of the speed of light is a direct consequence of the relativity principle, not an independent postulate. To see this let us consider the two postulates of special relativity as formulated by Einstein in his 1905 paper "On the electrodynamics of moving bodies": "the same laws of electrodynamics and optics will be valid for all frames of reference for which the equations of mechanics hold good. We will raise this conjecture (the purport of which will hereafter be called the "Principle of Relativity") to the status of a postulate, and also introduce another postulate, which is only apparently irreconcilable with the former, namely, that light is always propagated in empty space with a definite velocity c which is independent of the state of the motion of the emitting body". As the principle of relativity states that "the laws of physics are the same in all inertial reference frames" and the constancy of the speed of light means that "the speed of light is the same in all inertial reference frames (regardless of the motion of the source or the observer)" it follow that the second postulate is indeed a consequence of the first - the law describing the propagation of light is the same for all inertial observers."

Pentcho Valev