Several authors, including Robert Nozick and William F. O'Neill in two of the earliest academic critiques of her ideas, said she failed in her attempt to solve the is–ought problem.
sˈɛvɹəl ˈɔːθɚz, ɪŋklˈuːdɪŋ ɹˈɑːbɚt nˈɑːzɪk ænd wˈɪljəm ˈɛf. oʊnˈiːl ɪn tˈuː ʌvðɪ ˈɜːlɪɪst ˌækədˈɛmɪk kɹɪtˈiːks ʌv hɜːɹ aɪdˈiəz, sˈɛd ʃiː fˈeɪld ɪn hɜːɹ ɐtˈɛmpt tə sˈɑːlv ðɪ ɪz ˈɔːt pɹˈɑːbləm.