In his article, The Notion of Existence, Ahmad argued that the impact of scientific development has created the problem of the subjectivity of sense qualities and a separation between knowledge and existence.
ɪn hɪz ˈɑːɹɾɪkəl, ðə nˈoʊʃən ʌv ɛɡzˈɪstəns, ˈɑːmæd ˈɑːɹɡjuːd ðætðɪ ˈɪmpækt ʌv saɪəntˈɪfɪk dɪvˈɛləpmənt hɐz kɹiːˈeɪɾᵻd ðə pɹˈɑːbləm ʌvðə sˌʌbdʒɪktˈɪvᵻɾi ʌv sˈɛns kwˈɔlᵻɾiz ænd ɐ sˌɛpɚɹˈeɪʃən bᵻtwˌiːn nˈɑːlɪdʒ ænd ɛɡzˈɪstəns.