Quote (alexmourao @ Mar 22 2013 07:19pm)
it wasn't the fruits power increase that made him able to cut vergo, was his own haki denying vergo's armament thus making the fruit power be useable again
this
im pretty sure it has to do with willpower which is haki.
so law, overtime, attained stronger haki than Vergo's which nullified his haki thus being able to cut him