Original: He is usually known by those outside the field of mathematics for his essay from 1940 on the aesthetics of mathematics , A Mathematician 's Apology , which is often considered one of the best insights into the mind of a working mathematician written for the layman .
Simplified: In 1908 , unable to explain how a dominant gene would not become ubiquitous in a population , Reginald Punnett introduced his problem to Hardy , with whom he played cricket .