Comment Re:Can someone help explain "perfect" randomness? (Score 1) 138
No, the law of large numbers says that if you take lots of samples then the sample average will be very close to the underlying expected value, but it doesn't say that the underlying expected value of a binary valued random variable must be 0.5. To take a simple, albeit obviously pessimising, example, if we take two truly random uniform bit generators then we can combine them with bitwise AND to get a truly random bit generator with expected value 0.25.