wˈʌn ɪn pɚtˈɪkjʊlɚ ðæt hiː dɹˈɔːz ɐtˈɛnʃən tʊ ɪz ðə pˌɑːsəbˈɪlᵻɾi ʌv dˈɪfɹənsᵻz ɪn dˈɛbɪɾɪdʒ pˌɑːpjʊlˈeɪʃənz bˈeɪst ˌɔn ˌɪndᵻvˈɪdʒuːəl vˌɛɹɪˈeɪʃən ʌvðɪ ˈɑːɹɾɪfˌækt mˈeɪkɚ; ɪn hɪz ɛɡzˈæmpəl, θɹˈiː dˈɪfɹənt nˈæpɚz ˈɔːl jˈuːzɪŋ baɪpˈoʊlɚ kˈoːɹ ɹᵻdˈʌkʃən hæv dˈɪfɹənt pɚsˈɛntɪdʒᵻz ʌv sˈaɪz ɡɹˈeɪd θɹˈiː dˈɛbɪɾɪdʒ fˈaɪv.tˈuː pɚsˈɛnt, θˈɜːtiːn.tˈuː pɚsˈɛnt, ænd tˈɛn.tˈuː pɚsˈɛnt.
One in particular that he draws attention to is the possibility of differences in debitage populations based on individual variation of the artifact maker; in his example, three different knappers all using bipolar core reduction have different percentages of size grade 3 debitage (5.2%, 13.2%, and 10.2%).