Walter Harry Pitts, Jr. was a logician and computational neuroscientist. He originated the basis of many theories of neural activity and generative processes, which have greatly contributed to our understanding of cognitive science, psychology, neurosciences, and 
neural networks.
He was co-creator, with Warren McCulloch, of the  McCulloch–Pitts neuron model. The first algorithmic model of an artificial neuron.
1923 – 1969
April 23, 1923 to May 14, 1969
 
Walter Pitts was 
self-taught.