Template:Selected anniversaries/June 23
1390: Priest, philosopher, physicist, and theologian John Cantius born. He will help develop Jean Buridan's theory of impetus, anticipating the work of Galileo and Newton.
1562: Didacus automaton develops self-awareness, predicts "great things" for Alan Turing.
1912: Computer scientist, mathematician, logician, cryptanalyst and theoretical biologist Alan Turing born. He will be influential in the development of theoretical computer science, providing a formalization of the concepts of algorithm and computation with the Turing machine.
1913: While testing new data transmission protocols, Havelock and Nikola Tesla receive what appears to be a message from Alan Turing containing a description of what will later be known as a Turing machine.
1972: Watergate scandal: U.S. President Richard M. Nixon and White House Chief of Staff H. R. Haldeman are taped talking about using the Central Intelligence Agency to obstruct the Federal Bureau of Investigation's investigation into the Watergate break-ins.