Connor (davrostf)

Race #4901

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Official speed 113.93 wpm (39.08 seconds elapsed during race)
Race Start December 26, 2017 3:18:22am UTC
Race Finish December 26, 2017 3:19:01am UTC
Outcome Win (1 of 4)
Opponents 3. slagtherisen (84.74 wpm)
Accuracy 98.0%
Points 121.52
Text #3640570 (Length: 371 characters)

Property (c) is known as countable additivity. It is not something that can be proved, but it is like an assumption or an axiom. In our experience, we have seen that operating as if the assumption is correct leads to useful and credible answers to many problems, so we accept it as a reasonable assumption. Not all probabilists agree that countable additivity is natural.