In ethics, evasion is an act that deceives by stating a true statement that is irrelevant or leads to a false conclusion. For instance, a man knows that another man is in a room in the building because he heard him, but in answer to a question, says, "I have not seen him," thereby avoiding lying and also avoiding making a revelation. Evasion is described as a way to fulfill an obligation to tell the truth while keeping secrets from those not entitled to know the truth. Evasions are closely related to equivocations and mental reservations; indeed, some statements fall under both descriptions.