Synonyms for Discursive (same or very similar meaning)
WordNet sense 1 (proceeding to a conclusion by reason or argument rather than intuition):
dianoetic
WordNet sense 2 (capable of or reflecting the capability for correct and valid reasoning):
logical
WordNet sense 3 ((of e.g. speech and writing) tending to depart from the main point or cover a wide range of subjects):
digressive, excursive, rambling
From the ODE community, based on WordNet
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