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это спорный вопрос contraintes
génér.	it's a debatable point (тж. см. it's a debatable assertion, it's a debatable claim Taras); it's a debatable issue (Taras); it's a moot point (Taras)
dipl.	it's a matter of opinion (bigmaxus); this question is liable to dispute (bigmaxus)
scient.	it is a matter of argument; it is a matter of dispute

это спорный вопрос: 3 phrases, 2 sujets

Général	1
Mathématiques	2