the silex is a kind of a piano.
sent1: something that is not a kind of a signalman is piano and does notice. sent2: something that does notice is not a piano and does not devoice mailbox. sent3: the lypressin shillyshallies central and/or is not a kind of a juncture if something does not devoice mailbox. sent4: if the silex is not a kind of a piano then that either the lypressin does shillyshally central or it is not a juncture or both is incorrect. sent5: the silex is a kind of a signalman if it invigorates. sent6: the fact that something does tumefy or it does not devoice mailbox or both does not hold if it is a kind of a piano.
void -> assump1: Let's assume that the silex is not a kind of a piano.; sent4 & assump1 -> int1: that the lypressin does shillyshally central or it is not a kind of a juncture or both is incorrect.;
the fact that the lypressin tumefies and/or it does not devoice mailbox is not right.
sent6 -> int2: if the lypressin is a piano that it tumefies and/or it does not devoice mailbox is not right.; sent1 -> int3: the lypressin is a piano and it is a notice if it is not a signalman.;
$hypothesis$ = the silex is a kind of a piano. ; $context$ = sent1: something that is not a kind of a signalman is piano and does notice. sent2: something that does notice is not a piano and does not devoice mailbox. sent3: the lypressin shillyshallies central and/or is not a kind of a juncture if something does not devoice mailbox. sent4: if the silex is not a kind of a piano then that either the lypressin does shillyshally central or it is not a juncture or both is incorrect. sent5: the silex is a kind of a signalman if it invigorates. sent6: the fact that something does tumefy or it does not devoice mailbox or both does not hold if it is a kind of a piano. ; $proof$ = 
void -> assump1: Let's assume that the silex is not a kind of a piano.; sent4 & assump1 -> int1: that the lypressin does shillyshally central or it is not a kind of a juncture or both is incorrect.; __UNKNOWN__