Ludwig Wittgenstein portrait, flat vector illustration

 ludwig, wittgenstein, philosopher, analytic, philosophy, language, logic, meaning, truth, thought, propositions, tractatus, investigations, linguistics, reasoning, ideas, theory, mind, reality, concepts, semantics, syntax, understanding, knowledge, certainty, doubt, expression, communication, logicism, mathematics, analysis, clarity, thought process, interpretation, argument, intellectual, twentieth century, europe, austrian, cambridge