That's an interesting wording. Indeed critical thinking has nothing to do with mathematics, because mathematics is preoccupied with validity of logic (logical t

That's an interesting wording. Indeed critical thinking has nothing to do with mathematics, because mathematics is preoccupied with validity of logic (logical thought), sound logic is not a concern, because valid logic can be trivially converted into sound logic by postulating the premises. In practice this results in mathematicians' beliefs in paradoxes and platonism, which are results of valid unsound logic.