sympy__sympy-16988

Intersection should remove duplicates

Verdict: disputed: one of the two checks found quoted evidence (not counted as a flag).

my initial guess is that duplicates should just be removed at the outset of instantiation. Ordering them will produce canonical processing.

Disputed: one of the two checks found a stated fix, the other found nothing. Not counted as a flag; the quote is on the task page.

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