From Bob Watts, Bristol, UK
Shannon Hall explores the implications of everything allowed by physics happening (21 January, p 28). But I conjecture events with non-zero probabilities that will surely not happen anywhere. Is there a civilisation like ours but where every fair dice throw is a six for every person every time? Probabilities that tend to zero, with opportunities that tend to infinity, should maybe be treated like multiplying zero by infinity: the result is undefined.
A world where the least likely has always occurred is interesting to think about, though.
