Able to be challenged, questioned, or disputed; capable of being put to a test or confronted.
From challenge (from Old French 'chalenge' meaning accusation, from Latin 'calumnia' meaning false accusation) plus the suffix -able (from Latin 'habilis' meaning able). The -able suffix indicates something is capable of being acted upon.
In legal and academic contexts, distinguishing between challengeable and unchallengeable facts is crucial—some things can be questioned by parties with standing, while others are settled law.
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