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Now for something interesting: In Fig. 9 we launch a slightly faster tachyon to the left, at a velocity of -5.01, in the moving frame (the one 50 light-hours away). In Fig. 10 we see the picture at t=.01 hours after release. The tachyon is not to be seen! At this moment of time as seen from our frame, there is no clock which together with the x value of its position satisfies the velocity, -5.01, of the tachyon. For example, the moving frame clock at x = -10 reads 2.01. But for a tachyon moving at a velocity -5.01 it would have arrived at that clock at t= 10/5.01=1.996, and at the next clock at t=3.992 --- all readings earlier than the readings on the clocks. The times shown at the corresponding distances, just after t=0, at no point correspond to a possible position of the tachyon at that time. Lets set the clock in our frame to earlier than zero.
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Fig. 11 shows our time at t= -0.01 --- before we observe the tachyon launch. The tachyon appears! The tachyon appears, in our frame seemingly before it was launched. While it does appear so, this is simply another manifestation of sequence reversal similar to the lightning strikes at the front and rear of Einsteins train. Fig. 11 shows the tachyon arriving at approximately t=5 and x= -25 as expected
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Next, in Fig. 12 we move the clock to t = -0.02. The tachyon is now at about x = -49, or back approximately to Earth. We had to set our clock to -0.02 hours in order to locate the tachyon back near Earth. The tachyon is moving backward in time! We now could have, as we showed earlier, sent a message to a point 50 light-hours away in zero time, and then receive a reply 0.02 hours earlier --- before we sent it! Sounds like a great get-rich-quick scheme.

Imagine, we are watching prices on the N. Y. Stock Exchange. The price of an active stock jumps up and we send an I-sig, as before, with the stock name, and have the distant associate return the message with an FTL of 5.01. It arrives back about minute before it was sent --- just enough time to buy before the jump!

Well, one indisputable truth of life is that there is no guaranteed way of beating the stock market. Thus this stock market observation highlights a fatal flaw in our assumptions about tachyons. This is most disappointing.
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