I have CoS Tyrion in play and another copy of him in shadows. During the shadow phase I pay the two gold to bring it out of shadows and attach it to Tyrion.
Tyrion's response says:
Response: After a card comes out of Shadows, Tyrion Lannister gets +2 STR and gains your choice of Deadly, Renown, No Attachments, or Immune to Events until the end of the phase.
So I want to verify that a dup is still considered a card, so when Tyrion's dup comes out of shadows I can still trigger his response?