In a way that shows mutual relationship or connection; with items that depend on each other.
From correlative (adjective) plus the adverb suffix -ly, which converts adjectives into adverbs describing how something is done. Emerged in philosophical writing.
When philosophers say concepts relate 'correlatively,' they mean you can't understand one without understanding the other—like how 'parent' and 'child' or 'teacher' and 'student' are defined by their relationship.
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