In her Introduction to Objectivist Epistemology, Rand presented a theory of concept formation and rejected the analytic–synthetic dichotomy.
ɪn hɜːɹ ˌɪntɹədˈʌkʃən tʊ ɑːbdʒˈɛktɪvˌɪst ᵻpˌɪstɪmˈɑːlədʒi, ɹˈænd pɹɪzˈɛntᵻd ɐ θˈiəɹi ʌv kˈɑːnsɛpt fɔːɹmˈeɪʃən ænd ɹᵻdʒˈɛktᵻd ðɪ ˌænɐlˈɪɾɪk sɪnθˈɛɾɪk daɪkˈɑːɾəmi.