More than a century after its composition, Tractatus Logico-Philosophicus--Wittgenstein's first masterwork, and the only book he published during his lifetime--endures as the definitive modern text on what logic can and cannot do. Since its first English-language publication in 1922, this profoundly enigmatic work has inspired philosophers and non-philosophers alike. Consisting of 525 hierarchically numbered statements, each one "self-evident,"...