[adj] marked by an orderly, logical, and aesthetically consistent relation of parts; "a logical argument"; "the orderly presentation"
[adj] capable of or reflecting the capability for correct and valid reasoning; "a logical mind"
[adj] capable of thinking and expressing yourself in a clear and consistent manner; "a lucid thinker"; "she was more coherent than she had been just after the accident"
[adj] based on known statements or events or conditions; "rain was a logical expectation, given the time of year"
[adj] in accordance with reason or logic; "a logical conclusion"
coherent, consistent, dianoetic, discursive, formal, legitimate, lucid, ordered, orderly, ratiocinative, valid