Example image of eyePlorer eyePlorer map for 'Tractatus Logico-Philosophicus': Ludwig Wittgenstein Philosophy Human language Reality German language Prisoner of war World War I Friedrich Waismann Logical positivism Rudolf Carnap Vienna Circle Bertrand Russell Baruch Spinoza George Edward Moore Latin Theologico-Political Treatise Philosophical Investigations Proposition Truth function Logic Geometry Projection Semantics Truth condition Truth table Deductive reasoning Tautology Nand Henry M. Sheffer Theorem Sheffer stroke A priori and a posteriori Transcendence (philosophy) Aesthetics Ethics Mysticism Arthur Schopenhauer Aphorism Cambridge Charles Kay Ogden English language Frank P. Ramsey Mathematician Moritz Schlick New Wittgenstein James F. Conant Concluding Unscientific Postscript to Philosophical Fragments Poetry Rabindranath Tagore Symbolic system