Changes

[[Ludwig Wittgenstein|Ludwig Josef Johann Wittgenstein]] (April 26, 1889 – April 29, 1951) was an Austrian [[philosopher ]] who contributed several ground-breaking works to contemporary [[philosophy]], primarily on the foundations of [[logic]], the philosophy of [[mathematics]], the philosophy of [[language]], and the philosophy of [[mind]]. He is widely regarded as one of the most influential [[philosophers ]] of the 20th century.