the.com/confirmation bias

means The tendency to seek, notice, and remember information that confirms what you already believe while ignoring or discounting evidence that contradicts it.

from A 20th-century term from psychology — 'confirmation' from Latin confirmare, 'to strengthen,' and 'bias' from Old French biais, 'a slant or slope.' The phenomenon itself was named and studied in psychological research in the 1960s, notably through experiments on how people test hypotheses by seeking evidence that supports rather than challenges them. The phrase entered everyday language as it became clear the habit wasn't a lab curiosity but a universal human glitch.