ɪf ðə mæntˈɪsə ɪz ɐlˈaʊd təbi zˈiəɹoʊbˈɪt, ɐ wˈʌnbˈɪt flˈoʊt fˈɔːɹmæt wʊdhɐv ɐ wˈʌnbˈɪt ɛkspˈoʊnənt, ænd ðɪ ˈoʊnli tˈuː vˈæljuːz wʊd biː zˈiəɹoʊ ænd ˈɪnf.
If the mantissa is allowed to be 0-bit, a 1-bit float format would have a 1-bit exponent, and the only two values would be 0 and Inf.