Logical Investigations

The Logical Investigations (1900–1901; second edition 1913) are a two-volume work by the philosopher Edmund Husserl, in which the author discusses the philosophy of logic and criticizes psychologism, the view that logic is based on psychology. The work has been praised by philosophers for helping to discredit psychologism, Husserl’s opposition to which has been attributed to the philosopher Gottlob Frege’s criticism of his Philosophy of Arithmetic (1891).