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Who was the philosopher Ludwig Wittgenstein?
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Ludwig Wittgenstein was a philosopher who wrote about the nature of language. He is famous for his work Philosophical Investigations, which was published in 1953. He was also known for his book Tractatus Logico-Philosophicus, which was published in 1921. He was also a member of the Vienna Circle, which was a group of philosophers in Vienna, Austria in the early 20th century.