Selections of the influential philosopher's writings that span his career feature the full texts of ""Tractatus Logico-Philosophicus,"" ""On Certainty,"" and ""The Blue and Brown Books: Studies for 'Philosophical Investigations.'""
Selections of the influential philosopher's writings that span his career feature the full texts of ""Tractatus Logico-Philosophicus,"" ""On Certainty,"" and ""The Blue and Brown Books: Studies for 'Philosophical Investigations.'""