What is a term to refer to two ideas in exact opposition (e.g. good & bad, positive & negative)? [closed]
Solution 1:
polar opposites:
polar opposite (plural polar opposites):
The complete opposite, opposite in every way.
https://en.wiktionary.org/wiki/polar_opposite
"Polar opposites" might also refer to the scientific or technical definition of two things having exactly opposing or inverted polarity, sign, orientation, or some other property.
Solution 2:
I'd suggest dichotomy:
a difference between two opposite things : a division into two opposite groups.
Source - Merriam-Webster
Solution 3:
diametric
- in direct opposition; being at opposite extremes; complete: diametrical opposites; a diametrical difference. –dictionary.com
Two things which are absolute opposites of each other, are diametrically opposed or diametric. We often perceive coins as being diametric, while forgetting that they have a third side: the edge.
Solution 4:
Try antipodes at dictionary.com
either or both of two opposite things. (from singular "exact or opposite things")
They both are antipodes.