logical

(a) capable of or reflecting the capability for correct and valid reasoning
- a logical mind
(s) based on known statements or events or conditions
- rain was a logical expectation, given the time of year
legitimate,
(a) marked by an orderly, logical, and aesthetically consistent relation of parts
- a coherent argument
coherent, consistent, ordered,
(s) 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
coherent, lucid,

legitimate coherent consistent ordered lucid

illogical unlogical incoherent

logical argument logical diagram logical fallacy logical implication logicality logically logicalness logical operation logical positivism logical positivist logical proof logical quantifier logical relation logical system logical thinking logical topology