Capable of being taught, instructed, or made to accept a doctrine or set of beliefs.
From doctrine (Latin doctrina 'teaching, learning') + -able (from Old French -able 'capable of being'). This is a rare formation showing something that can receive doctrinal instruction.
This forgotten word suggests a troubling idea: that some people or groups are 'doctrinable' while others resist teaching—and how you answer that question often reveals your assumptions about human nature and free will.
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