Tangentially: It makes sense that the asker of the question gets to choose the answer that worked for them, but by doing so the idea of "duplicate questions" is

Tangentially: It makes sense that the asker of the question gets to choose the answer that worked for them, but by doing so the idea of "duplicate questions" is invalidated. For example, I could very well ask a new question which ends up being flagged as a duplicate of another question whose accepted answer does not work for me. Can two questions be duplicates if they have different answers? Do I only have to claim that the accepted answer does not work to show that the new question is unique?