2

As far as I know he was doing engineering and became interested in the foundations of mathematics and went to Frege and upon his advice he went to study logic from Russell.

So what happened which caused him to change his interests? Is there any historical statement supporting his conversion?

4

There were not "conversion" at all, but a progressive involvment with logic and language.

For historical evidence, see e.g. Letter to B.Russell [Nov.1913], with refernce to Bedeutung [reference] (a key-term of Frege's Philosophy of language) in relation to facts and proposition.

For W's philosophy of language in the Tractatus (1921), you can see Wittgenstein's Logical Atomism.

For early philosopical interests of Wittgenstein, we can see : Notes on Logic (1913); for details, see Michael Potter, Wittgenstein's Notes on Logic, a book fully dedicated to the first (unpublished) W's work, deeply involved with Russell's and Frege's philosophies about logic and language.

  • Thank you, your answer always helps me. Sometimes I feel, if feel is the word I want, that language expresses your thoughts and until you express your thoughts you can’t work or I should use it logically and so therefore language must give birth to philosophy. Even blind and deaf think in terms of pictures means expressing thoughts is most important thing. Am I correct? – adesh mishra Nov 24 '18 at 7:57

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