Which word means leaving no doubt; unambiguous?

The term "unequivocal" refers to something that leaves no doubt or is clear and unambiguous in meaning. It conveys a sense of certainty and decisiveness, indicating that there is only one interpretation or understanding of the information presented. This clarity is essential in various contexts, especially in law enforcement, where ambiguity can lead to misunderstandings or misinterpretations of situations and communications.

In contrast, the other options, such as "vague," "ambiguous," and "equivocal," all connote some level of uncertainty or lack of clarity. "Vague" suggests something that is not clearly stated or defined, "ambiguous" implies that there could be multiple interpretations, and "equivocal" indicates deliberate ambiguity or uncertainty. Therefore, the term "unequivocal" stands out as the clear choice for indicating something that is definitive and free from doubt.