In epistemology, Rand considered all knowledge to be based on sense perception, the validity of which she considered axiomatic, and reason, which she described as "the faculty that identifies and integrates the material provided by man's senses".
ɪn ᵻpˌɪstɪmˈɑːlədʒi, ɹˈænd kənsˈɪdɚd ˈɔːl nˈɑːlɪdʒ təbi bˈeɪst ˌɔn sˈɛns pɚsˈɛpʃən, ðə vælˈɪdᵻɾi ʌvwˈɪtʃ ʃiː kənsˈɪdɚd ˌæksɪəmˈæɾɪk, ænd ɹˈiːzən, wˌɪtʃ ʃiː dᵻskɹˈaɪbd æz "ðə fˈækəlti ðæt aɪdˈɛntᵻfˌaɪz ænd ˈɪntᵻɡɹˌeɪts ðə mətˈɪɹiəl pɹəvˈaɪdᵻd baɪ mˈænz sˈɛnsᵻz".