dogmatic
dawg-MAT-ikadjMeaning insisting one’s opinions are true without considering evidence
Memory hook DOG + MAT: a dog that won’t budge. Rufus has decided that the doormat is his, and no treat, toy or argument will move him an inch. Stuck to an opinion like a dog on its mat is dogmatic.
Our dogmatic neighbor insists there is only one right way to mow a lawn.
In context Good scientists change their minds when new evidence appears, but the dogmatic professor refused even to look at the results that contradicted his theory.
Similar opinionated, rigid, inflexible, closed-minded
Opposite open-minded, flexible
From Greek dogma, “opinion, belief,” from dokein, “to seem, to think.”