Related Clues:

• Convincing, as an argument
• Crystal clear
• Cogent
• Powerful businessman
• Believable
• Clear and understandable
• Easy to understand
• Appealing to the mind
• Perfectly clear
• Readily comprehended
• Easily understandable
• Comprehensible
• Forceful, as an argument
• Shuttle astronaut Shannon
• *Eloquent