“DICHOTOMOUS THINKING is an individual’s propensity to think in terms of binary opposition, such as “black or white,”“good or bad,” and “all or nothing.” This style of thought may be useful for quick decision-making; thinking dichotomously may lead to wide-ranging personality disorders.”
https://onlinelibrary.wiley.com/doi/full/10.1111/j.1468-5884.2012.00515.x