Thinking
Reasoning, straight-thinking, objective, cerebral, intelligent, wise, hard-headed, thinking, rational, analytical, insightful, judicious, and sensible.
Reasoned
Reasoned, rational, cogent, valid, coherent, well organized, orderly, articulate, relevant, deductive, inferential, well reasoned, sound, well thought out, lucid, clear, systematic, methodical, consistent, syllogistic, inductive, and joined-up.
Natural
Natural, only to be expected, reasonable, predictable, likeliest, right, practical, unsurprising, understandable, sensible, most likely, obvious, and correct.