the fact that if the Frankishness does not occur then the subsiding Caspar does not occur is not true.
sent1: that the Frankishness does not occur is prevented by that the subsiding Caspar happens.
void -> assump1: Let's assume that the subsiding Caspar happens.; sent1 & assump1 -> int1: the Frankishness happens.; void -> assump2: Let's assume that the Frankishness does not occur.; int1 & assump2 -> int2: this is contradiction.; [assump1] & int2 -> int3: the subsiding Caspar does not occur.; [assump2] & int3 -> hypothesis;
$hypothesis$ = the fact that if the Frankishness does not occur then the subsiding Caspar does not occur is not true. ; $context$ = sent1: that the Frankishness does not occur is prevented by that the subsiding Caspar happens. ; $proof$ = 
void -> assump1: Let's assume that the subsiding Caspar happens.; sent1 & assump1 -> int1: the Frankishness happens.; void -> assump2: Let's assume that the Frankishness does not occur.; int1 & assump2 -> int2: this is contradiction.; [assump1] & int2 -> int3: the subsiding Caspar does not occur.; [assump2] & int3 -> hypothesis; __DISPROVED__