I do not think that What happens if you cast Counterspell on a creature that is not casting a spell? is a duplicate of What happens when a caster targets an object that looks like a creature with a spell that targets only creatures?. In fact, besides the fact that they both deal with targeting, the question is not at all the same.
My understanding is that we only mark as duplicate when the questions are the same, and not because the answers could overlap.
Am I wrong?