the screwup does not occur and the flood does not occur.
sent1: the fact that the perception does not occur is correct. sent2: the flooding does not occur. sent3: that the epidural happens and the climax does not occur yields that the perception occurs. sent4: that the epidural but not the climax happens is caused by the screwup. sent5: if the screwup does not occur and the perception does not occur the roofing does not occur.
void -> assump1: Let's assume that the screwup occurs.; sent4 & assump1 -> int1: the epiduralness occurs and the climax does not occur.; int1 & sent3 -> int2: that the perception happens is right.; int2 & sent1 -> int3: this is contradiction.; [assump1] & int3 -> int4: the screwup does not occur.; int4 & sent2 -> hypothesis;
the roofing does not occur.
$hypothesis$ = the screwup does not occur and the flood does not occur. ; $context$ = sent1: the fact that the perception does not occur is correct. sent2: the flooding does not occur. sent3: that the epidural happens and the climax does not occur yields that the perception occurs. sent4: that the epidural but not the climax happens is caused by the screwup. sent5: if the screwup does not occur and the perception does not occur the roofing does not occur. ; $proof$ = 
void -> assump1: Let's assume that the screwup occurs.; sent4 & assump1 -> int1: the epiduralness occurs and the climax does not occur.; int1 & sent3 -> int2: that the perception happens is right.; int2 & sent1 -> int3: this is contradiction.; [assump1] & int3 -> int4: the screwup does not occur.; int4 & sent2 -> hypothesis; __PROVED__