Adjectives

(a)logicalcapable of or reflecting the capability for correct and valid reasoning“a logical mind”
(a)coherent, consistent, logical, orderedmarked by an orderly, logical, and aesthetically consistent relation of parts“a coherent argument”
(s)legitimate, logicalbased on known statements or events or conditions“rain was a logical expectation, given the time of year”
(s)coherent, logical, lucidcapable 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”