# Philosophical Investigations - Ludwig Wittgenstein **Opening (not a real abstract):** First published 1953 Second edition 1958 Reprint of English text alone 1963 Third edition of English and German text with index 1967 Reprint of English text with index 1968, 1972, 1974, 1976, 1978, 1981, 1986 **Authors:** [[LUDWIG WITTGENSTEIN]]