Aristotle believed the chain of thought, which ends in recollection of certain impressions, was connected systematically in relationships such as similarity, contrast, and contiguity, described in his laws of association.
ˈæɹɪstˌɑːɾəl bᵻlˈiːvd ðə tʃˈeɪn ʌv θˈɔːt, wˌɪtʃ ˈɛndz ɪn ɹˌɛkəlˈɛkʃən ʌv sˈɜːʔn̩ ɪmpɹˈɛʃənz, wʌz kənˈɛktᵻd sˌɪstəmˈæɾɪkli ɪn ɹᵻlˈeɪʃənʃˌɪps sˈʌtʃ ɐz sˌɪmɪlˈæɹᵻɾi, kˈɑːntɹæst, ænd kɑːntɪɡjˈuːɪɾi, dᵻskɹˈaɪbd ɪn hɪz lˈɔːz ʌv ɐsˌoʊsɪˈeɪʃən.