Which statement would be most helpful to determine must-be-true status of the claim?

• A. A counterexample that would disprove the claim
• B. A speculative reason supporting the claim
• C. A hypothetical scenario that slightly supports the claim
• D. Direct evidence that underpins the claim

Answer: (D)

When determining whether a claim must be true, the strongest support comes from direct evidence that ties the conclusion directly to the premises. Direct evidence shows that, given the information we have, the conclusion follows necessarily. It rules out alternative outcomes because it anchors the claim in facts, rules, or definitions that cannot be contradicted within the scenario. This is why direct evidence is the most helpful tool for establishing necessity.

In contrast, a counterexample would demonstrate that the conclusion can fail even when the premises hold, which tells you the claim is not must-be-true. Speculative reasons or hypothetical scenarios can suggest possibilities or illustrate how things might work, but they do not guarantee the conclusion in all cases, so they don’t establish necessity.

Therefore, direct evidence that underpins the claim provides the clearest, most reliable basis for declaring a statement must be true given the premises.