I have provided accounts of five striking coincidences over my lifetime. The five events individually have odds in the range 10^{-9 }to 10^{-18}. What are the odds that all five coincidences could happen to one individual?

To determine the probability of five independent events, A, B, C, D and E, all occurring, we need to multiply the probabilities of the individual events:

P(A and B and C and D and E) = P(A)×P(B) x P(C)×P(D) x P(E)

The five coincidences, which were independent of each another, are as follows:

A) The Chiswick Coincidence: P=10^{-18 }= one chance in 1,000,000,000,000,000,000 = one in one quintillion (a million, million, million)