why... (fourshademk2)

Race #8745

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Official speed 126.77 wpm (25.46 seconds elapsed during race)
Race Start May 21, 2018 10:00:21am UTC
Race Finish May 21, 2018 10:00:47am UTC
Outcome Win (1 of 4)
Accuracy 99.0%
Points 103.53
Text #3811410 (Length: 269 characters)

Any physical theory is always provisional, in the sense that it is only a hypothesis: you can never prove it. No matter how many times the results of experiments agree with some theory, you can never be sure that the next time the result will not contradict the theory.