the fact that the cistern is a kind of the valetudinarian if the fact that the cistern is a kind of thalloid thing that is not a Hampshire is incorrect is not correct.
sent1: the cistern is not urban if the fact that it is thalloid and is a Hampshire is false. sent2: the cistern is not urban if the fact that it is thalloid and it is not a kind of a Hampshire is incorrect. sent3: the cistern does not tinge. sent4: the cistern is a valetudinarian if it is not urban and does not tinge.
void -> assump1: Let's assume that that the cistern is both thalloid and not a Hampshire is incorrect.; sent2 & assump1 -> int1: the cistern is not urban.; int1 & sent3 -> int2: the cistern is not urban and it does not tinge.; int2 & sent4 -> int3: the cistern is a kind of a valetudinarian.; [assump1] & int3 -> hypothesis;
$hypothesis$ = the fact that the cistern is a kind of the valetudinarian if the fact that the cistern is a kind of thalloid thing that is not a Hampshire is incorrect is not correct. ; $context$ = sent1: the cistern is not urban if the fact that it is thalloid and is a Hampshire is false. sent2: the cistern is not urban if the fact that it is thalloid and it is not a kind of a Hampshire is incorrect. sent3: the cistern does not tinge. sent4: the cistern is a valetudinarian if it is not urban and does not tinge. ; $proof$ = 
void -> assump1: Let's assume that that the cistern is both thalloid and not a Hampshire is incorrect.; sent2 & assump1 -> int1: the cistern is not urban.; int1 & sent3 -> int2: the cistern is not urban and it does not tinge.; int2 & sent4 -> int3: the cistern is a kind of a valetudinarian.; [assump1] & int3 -> hypothesis; __DISPROVED__