[adjective] having the capacity for thought and reason especially to a high degree; "is there intelligent life in the universe?"; "an intelligent question"
[adjective] exercising or showing good judgment; "healthy scepticism"; "a healthy fear of rattlesnakes"; "the healthy attitude of French laws"; "healthy relations between labor and management"; "an intelligent solution"; "a sound approach to the problem"; "sound advice"; "no sound explanation for his decision" Synonyms:healthy, levelheaded, sound
[adjective] endowed with the capacity to reason Synonyms:reasoning, thinking