the antifreeze is not a Sphinx.
sent1: the beachball is not a kind of a Sphinx. sent2: something is a Sphinx if it is a kind of non-dogmatic thing that is not biogeographic. sent3: if the fact that something is not dogmatic but it is a Sphinx is not right then it is not a kind of a Sphinx. sent4: the antifreeze is not dogmatic if the Firth does not erupt. sent5: the antifreeze is not dogmatic and it is not biogeographic if the Firth does not erupt. sent6: if the Firth either rinses or is verbal or both it does not erupt. sent7: if the Firth is verbal it does not erupt. sent8: the Firth is a rinse and/or is verbal. sent9: the antifreeze is not dogmatic.
sent6 & sent8 -> int1: the Firth does not erupt.; int1 & sent5 -> int2: the antifreeze is not dogmatic and it is not biogeographic.; sent2 -> int3: if the antifreeze is not dogmatic but non-biogeographic it is a Sphinx.; int2 & int3 -> hypothesis;
the antifreeze is not a Sphinx.
sent3 -> int4: if the fact that the antifreeze is not dogmatic but it is a kind of a Sphinx is wrong then it is not a Sphinx.;
$hypothesis$ = the antifreeze is not a Sphinx. ; $context$ = sent1: the beachball is not a kind of a Sphinx. sent2: something is a Sphinx if it is a kind of non-dogmatic thing that is not biogeographic. sent3: if the fact that something is not dogmatic but it is a Sphinx is not right then it is not a kind of a Sphinx. sent4: the antifreeze is not dogmatic if the Firth does not erupt. sent5: the antifreeze is not dogmatic and it is not biogeographic if the Firth does not erupt. sent6: if the Firth either rinses or is verbal or both it does not erupt. sent7: if the Firth is verbal it does not erupt. sent8: the Firth is a rinse and/or is verbal. sent9: the antifreeze is not dogmatic. ; $proof$ = 
sent6 & sent8 -> int1: the Firth does not erupt.; int1 & sent5 -> int2: the antifreeze is not dogmatic and it is not biogeographic.; sent2 -> int3: if the antifreeze is not dogmatic but non-biogeographic it is a Sphinx.; int2 & int3 -> hypothesis; __DISPROVED__