Valentino Annibale Pastore, an Italian philosopher and logician, was born at Orbassano (Teramo), Italy. He educated himself in literary studies, and then obtained a degree in letters from the University of Turin, under Arturo Graf, with a thesis on La vita delle forme letterarie (The life of literary forms), which was published at Turin in 1892. Pastore then turned to philosophy and was influenced by Hegelianism through the teachings of Pasquale d'Ercole. At the same time he was influenced by such scientists as Friedrich Kiesow, A. Garbasso, and Giuseppe Peano. In 1903 he published in Turin his thesis in philosophy, Sopra le teorie della scienza: logica, matematica, fisica (On the theories of science: logic, mathematics, physics). In 1911 he began teaching theoretical philosophy at Turin, where he was full professor from 1921 until 1939 and where he instituted a laboratory of experimental logic.

Pastore's thesis was published...