the fact that something is not a kind of a samovar and is Sisyphean is incorrect.
sent1: the Lord is not ungrateful. sent2: something is a kind of non-ungrateful a samovar. sent3: if the Lord is not ungrateful the coverall is not a samovar but Sisyphean.
sent3 & sent1 -> int1: the coverall is not a kind of a samovar but it is Sisyphean.; int1 -> hypothesis;
$hypothesis$ = the fact that something is not a kind of a samovar and is Sisyphean is incorrect. ; $context$ = sent1: the Lord is not ungrateful. sent2: something is a kind of non-ungrateful a samovar. sent3: if the Lord is not ungrateful the coverall is not a samovar but Sisyphean. ; $proof$ = 
sent3 & sent1 -> int1: the coverall is not a kind of a samovar but it is Sisyphean.; int1 -> hypothesis; __DISPROVED__