ɪɾ ɪz fˈɑːɹ fɹʌm stɹeɪtfˈɔːɹwɚd tə dᵻfˈaɪn wʌt ɐ sˈɛnsᵻbəl bᵻlˈiːf ʃˌʊd biː fɔːɹ ðoʊz ˌɪnfɚmˈeɪʃən sˈɛts ðæt ɑːɹ ɹˈiːtʃt wɪð pɹˌɑːbəbˈɪlᵻɾi zˈiəɹoʊ, ɡˈɪvən ðə stɹˈæɾədʒiz.
It is far from straight­forward to define what a sensible belief should be for those information sets that are reached with probability zero, given the strategies.