Comments

@jchrisgilmore , while you correctly quote published information, this is based on many assumptions and flawed logic. It starts with the odds of your parents meeting (1 in 20000) then works forward to your existence, and backward to the beginning of all life. Not really an accurate portrayal of odds. Odds predict future events, so if you existed at the start of all life, then the odds of any particular person existing today might be reasonable. It's like saying the odds of pulling an ace from a deck of cards is 1 in 13. True before the fact, but if you have already pulled the ace, then the actuality is 1 in 1.

@occasionalmutant, you HAVE to make assumptions when calculating theoretical odds. There is no possible way to calculate them any other way based on an incredible set of variables. Your odds didn’t change when you pulled the ace, just your success vs attempts ratio. The odds were still 1:13 after you pulled it, you just beat the odds.
It’s actually 1 in 10^2,685,000. That’s a 10 with 2,685,000 zeros after it.