When people recall experiences, they stimulate certain previous experiences until they reach the one that is needed.
wˌɛn pˈiːpəl ɹˈiːkɔːl ɛkspˈiəɹɪənsᵻz, ðeɪ stˈɪmjʊlˌeɪt sˈɜːʔn̩ pɹˈiːviəs ɛkspˈiəɹɪənsᵻz ʌntˈɪl ðeɪ ɹˈiːtʃ ðə wˈʌn ðæt ɪz nˈiːdᵻd.