the fact that the bestirring underseller does not occur is right.
sent1: if the athleticsness does not occur then the negligence does not occur. sent2: the artfulness occurs. sent3: if the private occurs the aphakic does not occur and the negligence does not occur. sent4: the aphakic does not occur if the undrinkableness happens and/or the athleticsness occurs. sent5: if the private happens then the journalisticness does not occur. sent6: if the undrinkableness happens then the bestirring underseller happens. sent7: if the aphakicness does not occur and the negligence does not occur the fact that the undrinkableness does not occur is right. sent8: the journalisticness does not occur if the private occurs and/or the negligence does not occur. sent9: that the refutation but not the athleticsness happens is not right if the undrinkableness does not occur. sent10: if the undrinkableness happens then the aphakic does not occur. sent11: if the journalisticness does not occur then that the bestirring underseller does not occur hold. sent12: if that the refutation and the non-athleticsness happens does not hold the refutation does not occur. sent13: the aphakicness happens if the artfulness occurs.
void -> assump1: Let's assume that the athleticsness occurs.; assump1 -> int1: the undrinkableness happens or the athleticsness happens or both.; int1 & sent4 -> int2: the aphakicness does not occur.; sent13 & sent2 -> int3: the aphakic happens.; int2 & int3 -> int4: this is contradiction.; [assump1] & int4 -> int5: the athleticsness does not occur.; int5 & sent1 -> int6: the negligence does not occur.; int6 -> int7: either the private occurs or the negligence does not occur or both.; int7 & sent8 -> int8: the journalisticness does not occur.; int8 & sent11 -> hypothesis;
the refutation does not occur.
$hypothesis$ = the fact that the bestirring underseller does not occur is right. ; $context$ = sent1: if the athleticsness does not occur then the negligence does not occur. sent2: the artfulness occurs. sent3: if the private occurs the aphakic does not occur and the negligence does not occur. sent4: the aphakic does not occur if the undrinkableness happens and/or the athleticsness occurs. sent5: if the private happens then the journalisticness does not occur. sent6: if the undrinkableness happens then the bestirring underseller happens. sent7: if the aphakicness does not occur and the negligence does not occur the fact that the undrinkableness does not occur is right. sent8: the journalisticness does not occur if the private occurs and/or the negligence does not occur. sent9: that the refutation but not the athleticsness happens is not right if the undrinkableness does not occur. sent10: if the undrinkableness happens then the aphakic does not occur. sent11: if the journalisticness does not occur then that the bestirring underseller does not occur hold. sent12: if that the refutation and the non-athleticsness happens does not hold the refutation does not occur. sent13: the aphakicness happens if the artfulness occurs. ; $proof$ = 
void -> assump1: Let's assume that the athleticsness occurs.; assump1 -> int1: the undrinkableness happens or the athleticsness happens or both.; int1 & sent4 -> int2: the aphakicness does not occur.; sent13 & sent2 -> int3: the aphakic happens.; int2 & int3 -> int4: this is contradiction.; [assump1] & int4 -> int5: the athleticsness does not occur.; int5 & sent1 -> int6: the negligence does not occur.; int6 -> int7: either the private occurs or the negligence does not occur or both.; int7 & sent8 -> int8: the journalisticness does not occur.; int8 & sent11 -> hypothesis; __PROVED__