Complete the following sentence using the most appropriate words in all four blanks.

A discerning scholar presents a _______ argument supported by _______ evidence and maintains a/an _______ tone even when confronted with conflicting viewpoints during rigorous academic discussions and peer evaluations.

This question tests vocabulary in an academic context. The blanks need words that describe a skilled scholar's argument, evidence, and behavior during debates.

Option 1 -> cohesive / verifiable / authoritative: "Authoritative" suggests a commanding tone, which doesn't fit well with handling conflicting viewpoints gracefully. A scholar shouldn't be domineering during disagreements.

Option 2 -> consistent / verifiable / civil: "Consistent" describes repetition rather than argument quality. While acceptable, this combination lacks precision for academic writing.

Option 3 -> cogent / credible / respectful: "Cogent" means clear and convincing (strongest word for scholarly arguments), "credible" means believable and trustworthy (perfect for evidence), and "respectful" shows appropriate behavior when facing opposition.

Option 4 -> coherent / legitimate / decorous: "Legitimate" has a legal connotation that sounds odd with "evidence." "Decorous" (meaning proper/dignified) is overly formal and archaic.

Hence, Option 3 -> cogent perfectly captures a well-reasoned scholarly argument, credible naturally pairs with evidence, and respectful appropriately describes maintaining composure during academic disagreements -> correct