hˈækɚɹ ɪz wˈʌn ʌvðə mˈoʊst ɪmpˈoːɹtənt kəntˈɛmpɚɹˌɛɹi ɛkspˈoʊnənts ʌvðə lɪŋɡwˈɪstɪkθˌɛɹəpjˈuːɾɪk ɐpɹˈoʊtʃ tə fɪlˈɑːsəfi paɪənˈɪɹd baɪ lˈʌdwɪɡ wˈɪtdʒənstˌaɪn.
Hacker is one of the most important contemporary exponents of the linguistic-therapeutic approach to philosophy pioneered by Ludwig Wittgenstein.