Dichotomies and binary opositions aren't just wrong on principle. Sometimes it's useful and legitimate to just say "there's a big division between type 1 things and type 2 things, and it's worth making the distinction""
I suggest criticising a dichotomy when you have an alternative pattern :
- When there's a detail which opens up more dimensions of difference (CounterThinking)
- when there's a genuine continuum
A quick index of some of the dichotomies people are arguing are false :
See also TypesOfThinking