ðə dɪskˈʌvɚɹi ɪn ɐ kˈɑːmplɛks kɐtˈæstɹəfi mˈʌstɐv ðə sˈeɪm kwˌɔlɪfɪkˈeɪʃənz æz ðə kɐtˈæstɹəfi ɪtsˈɛlf, ʌvwˈɪtʃ ɪɾ ɪz ɐ pɹˈɪnsɪpəl pˈɑːɹt: ɪt mˈʌst biː bˈoʊθ pɹˈɑːbəbəl ænd nˈɛsᵻsɚɹi.
The discovery in a complex catastrophe must have the same qualifications as the catastrophe itself, of which it is a principal part: it must be both probable and necessary.