(Im)probabilities
What are the odds of running into one of the three people you know in London, in a small suburbian cinema that you happen to visit with another one out of these three? What are the odds of, on the very next day, running into the missing third of The Three People You Know in London, in the park surrounding Kenwood House? What are the odds of one of the Three People You Know in London running into one of the Ten People They Know in London, who at the same time happens to be one of the Twenty People They Know from Frankfurt? What are the odds of only one of the aforementioned people being pregnant, but of at least two of them having back problems?