I wouldn’t equate trigonometry, which underpins the classic parabolic example you’re referring to, with critical reasoning in human conversation. One is situationally useful at best; the other is mandatory to prevent exploitation by malicious people. Mental quadratics may be appealing, but the ability to reason is the bare minimum. Besides: if you’re using a calculator or AI in a board meeting, you’re likely unprepared for the board meeting.

I'm not sure how you did proofs in trigonometry with a calculator.