In a way that assumes something is true without needing to check the facts or experience it yourself.
From 'a priori' (Latin for 'from the before'), combined with the suffix '-istic' (relating to a system or method) and '-ally' (in a certain manner). The term evolved in philosophy to describe reasoning based on theory rather than observation.
This word captures how mathematicians solve problems before testing them—like knowing 2+2=4 just by thinking about it, not by counting apples! It's the opposite of how scientists work, who need evidence from experiments.
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