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adj.
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"
adj.
perceiving the significance of events before they occur; "extraordinarily prescient memoranda on the probable course of postwar relations"-R.H.Rovere