hiː bᵻlˈiːvz ðæt ɛmpˈɪɹɪkəl ɑːbzɚvˈeɪʃən ænd ɹᵻsˈɜːtʃ ɪz ɐ kˌæɾɪɡˈɔːɹɪkli dɪstˈɪŋkt kˈaɪnd ʌv æktˈɪvᵻɾi fɹʌm kənsˈɛptʃuːəl ɪnvˌɛstɪɡˈeɪʃən ænd klˌæɹɪfɪkˈeɪʃən, ˈiːvən ðˌoʊ ðɛɹ ɪz sˈʌmtaɪmz nˈoʊ ʃˈɑːɹp dᵻvˈaɪdɪŋ lˈaɪn bᵻtwˌiːn ðə tˈuː.
He believes that empirical observation and research is a categorically distinct kind of activity from conceptual investigation and clarification, even though there is sometimes no sharp dividing line between the two.