When counter-arguments of equal or greater force are put forth in support of an opposing conclusion, it is called a

The situation described is one where opposing reasons of equal strength stand against each other.

Against a conclusion, counter-arguments of equal or greater force back the opposite view.

Neither side can prevail because each is offset by the other.

The reason is thus neutralised by an equally weighty opposing reason.

This balanced deadlock is the fallacy of the counterbalanced, satpratipaksa.