the forearm is azo.
sent1: if something folds leeward it is azo. sent2: if something is azo then it is sacrificial. sent3: if something is not a dot it is not azo. sent4: if the forearm is a dot then it folds leeward. sent5: the insect folds leeward. sent6: the forearm is a dot. sent7: the forearm is a kind of a Psaltriparus.
sent4 & sent6 -> int1: the forearm does fold leeward.; sent1 -> int2: if the forearm folds leeward it is azo.; int1 & int2 -> hypothesis;
if the forearm is azo then it is not non-sacrificial.
sent2 -> hypothesis;
$hypothesis$ = the forearm is azo. ; $context$ = sent1: if something folds leeward it is azo. sent2: if something is azo then it is sacrificial. sent3: if something is not a dot it is not azo. sent4: if the forearm is a dot then it folds leeward. sent5: the insect folds leeward. sent6: the forearm is a dot. sent7: the forearm is a kind of a Psaltriparus. ; $proof$ = 
sent4 & sent6 -> int1: the forearm does fold leeward.; sent1 -> int2: if the forearm folds leeward it is azo.; int1 & int2 -> hypothesis; __PROVED__