ɪɾ ɪz ˈɔːlsoʊ stɹeɪtfˈɔːɹwɚd tə dᵻfˈaɪn wʌt ɐ sˈɛnsᵻbəl bᵻlˈiːf ʃˌʊd biː fɔːɹ ðoʊz ˌɪnfɚmˈeɪʃən sˈɛts ðæt ɑːɹ ɹˈiːtʃt wɪð pˈɑːzᵻtˌɪv pɹˌɑːbəbˈɪlᵻɾi ɡˈɪvən ðə stɹˈæɾədʒiz; ðə bᵻlˈiːfs ʃˌʊd biː ðə kəndˈɪʃənəl pɹˌɑːbəbˈɪlᵻɾi dˌɪstɹɪbjˈuːʃən ɔnðə nˈoʊdz ʌvðɪ ˌɪnfɚmˈeɪʃən sˈɛt, ɡˈɪvən ðˌɐɾɪt ɪz ɹˈiːtʃt.
It is also straightforward to define what a sensible belief should be for those information sets that are reached with positive probability given the strategies; the beliefs should be the conditional probability distribution on the nodes of the information set, given that it is reached.