Sound
Else clues• Believable
• Clear and convincing
• Company man is convincing (6)
• Compelling, as an argument
• Convincing
• Convincing, as an argument
• Convincingly stated
• Effective
• Effective, as an argument
• Forceful
• Forceful, as an argument
• Like a good argument
• Making sense
• Penetrating
• Persuasive
• Powerfully persuasive
• Relevant
• Telling
• To the point
• Valid
• Well-thought-out