Thomas Bayes
died 256 years ago
17th April 1761

Thomas Bayes set out his theory of probability in 1764. His conclusions were accepted by Laplace in 1781, rediscovered by Condorcet, and remained unchallenged until Boole questioned them. Since then Bayes' techniques have been subject to controversy.

Find out more at:
http://www-history.mcs.st-andrews.ac.uk/Mathematicians/Bayes.html