疑点 (yí diǎn) refers to a concrete point or detail that is doubtful or suspicious, typically in an investigation, document, or testimony. Unlike 疑问 (yí wèn, a general question or uncertainty) or 疑惑 (yí huò, a feeling of being puzzled), 疑点 pinpoints a specific item under suspicion. It also contrasts with 疑虑 (yí lǜ, misgivings or hesitation about a course of action).