dianoetic, discursive -- (proceeding to a conclusion by reason or argument rather than intuition)
digressive, discursive, excursive, rambling -- ((of e.g. speech and writing) tending to depart from the main point or cover a wide range of subjects; "amusingly digressive with satirical thrusts at women's fashions among other things"; "a rambling discursive book"; "his excursive remarks"; "a rambling speech about this and that")
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