badly mistaken

Related

confused · off-base · wayward · foolish · blundering · misjudged · flawed · incorrect · muddled · astray · blind · ignorant · foolhardy · reckless · bungled · botched · fumbled · disastrously

Opposites
accuracy of belief or judgment

badly mistakenabsolutely right

Entirely correct, no exceptions

spot-on · bang on · on the money · on target · right on target

epistemic confidence and validity

badly mistakenwell-founded

Having sound basis

well-informed · well-grounded · clear-eyed

Familiarity
Top 2,000,000