Holding that a particular mental phenomenon, such as motivation or justification, has an internal rather than external basis(adjective)
A supporter of internalism(noun)
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Use "internalist" in a sentence
"I will call the internalist sense of the theory theory "theory theory (internal)"."
"What connection does that highly "internalist" enterprise have with the design of social systems or institutions?"
"Of course, you can be an internalist or externalist at different altitudes of development, and historically these have changed over time, as we've already seen."