said by Qumahlin :

If you cut my hand off I don't get to cut your hand off, it doesn't work that way. Hence "two wrongs don't make a right"...in some countries the statement is untrue because they actually do see two wrongs being fair...you cut off my hand, I cut off your hand and everyone in happy.

said by loincloth :

If a left-handed person cuts off the left hand of another left-handed person (wrong #1), and the victim reciprocates (wrong #2), then two wrongs makes two righties!