the Gentianella is otic.
sent1: the boxer is not a kind of a fair if something is a Budapest and is not discourteous. sent2: if that the car-ferry is a kind of a jabber and/or does not facilitate does not hold then it is not a Ursus. sent3: the car-ferry is a fair. sent4: if the Gentianella is not a kind of a Ursus the car-ferry fairs and it is otic. sent5: that either the car-ferry is a jabber or it does not facilitate or both is wrong. sent6: the Gentianella is otic if the car-ferry is not a Ursus but it is a kind of a fair. sent7: everything is a Budapest that is not discourteous.
sent2 & sent5 -> int1: that the car-ferry is not a Ursus hold.; int1 & sent3 -> int2: the car-ferry is not a Ursus but it fairs.; int2 & sent6 -> hypothesis;
that the car-ferry is otic is correct.
$hypothesis$ = the Gentianella is otic. ; $context$ = sent1: the boxer is not a kind of a fair if something is a Budapest and is not discourteous. sent2: if that the car-ferry is a kind of a jabber and/or does not facilitate does not hold then it is not a Ursus. sent3: the car-ferry is a fair. sent4: if the Gentianella is not a kind of a Ursus the car-ferry fairs and it is otic. sent5: that either the car-ferry is a jabber or it does not facilitate or both is wrong. sent6: the Gentianella is otic if the car-ferry is not a Ursus but it is a kind of a fair. sent7: everything is a Budapest that is not discourteous. ; $proof$ = 
sent2 & sent5 -> int1: that the car-ferry is not a Ursus hold.; int1 & sent3 -> int2: the car-ferry is not a Ursus but it fairs.; int2 & sent6 -> hypothesis; __PROVED__