In the given case, why is Jim not liable for defamation against Diane?

Jim is not liable for defamation against Diane primarily because the statement he made was true. In defamation cases, the defense of truth is one of the strongest and most accepted defenses. If a statement can be proven true, it cannot be considered defamatory, regardless of the harm it may cause to the reputation of the person it concerns. This principle upholds the importance of free speech and allows for honest discourse without fear of legal repercussions.

Although the other options present certain defense arguments—such as not speaking about Diane, expressing an opinion rather than stating a fact, or lacking intent to harm—none are as definitive as the truth of the statement. For example, if a statement is true, it holds no defamatorial weight, making the other considerations less relevant in establishing liability. Truth serves as a robust shield against claims of defamation, protecting individuals who communicate accurate information, even if that information could potentially damage someone’s reputation.