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### Why were these questions closed as duplicates?

The question Need Examples to Understand Choice Function and Choice Structure is in no way a duplicate for the following question: (P(X),CR) may be a choice structure even if R is not a rational ...
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### A few high quality duplicates

Suppose we have a small number of very close duplicates on some particular question. Suppose also that the questions are high quality and have high quality answers - at least, as measured by the ...
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### Appropriate way to place sound arguments when reopening a duplicate marked question

The possibility to reopen a duplicate marked question is a nice feature. This action is usually based (at least I do hope so) upon sound arguments. Is there a way to attach or combine these ...
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### Metrics for questions

Lately I had a case that one of my questions was marked "as an exact duplicate". Projection, rotation and skew-symetry in N-dimensional space Commutativity of projection and rotation But what the ...