In a manner opposed to or contradicting scientific principles and evidence.
From antiscientific + -ly. The adverbial suffix -ly converts the adjective into an adverb describing how an action is performed, creating a standard English adverbial form.
People acting antiscientifically aren't necessarily stupid—they might have valid cultural values about community, tradition, or autonomy that they're prioritizing over empirical evidence. The word is more useful when we acknowledge this complexity.
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