A bit beside the point, but on the subject of Einstein... A famous anecdote about Einstein is that he was told his baby sister Maja would be like a new toy, and when he first saw her he's quoted as saying, "Yes, but where does it have its small wheels?". One can just look at their birth dates, he would have been 2 years 8 months at her birth. The two two statements (the anecdote and the bit about his talking at 4) appear in the same articles, but they can't both be true.

Polly