Related Clues:

• Prudent
• Mentally sound
• Level-headed
• Intelligible
• Not certifiable, so to speak
• Right upstairs
• Neither nuts nor crackers
• Easily understood
• With it, mentally
• Not mad
• Lucid, mentally
• Untouched?
• Court-appointed psychiatrist's ruling
• Undisturbed?
• Well-thought-out