In criminal law, recklessness (also called unchariness) is one of the four possible classes of mental state constituting mens rea (the Latin for "guilty mind"). To commit an offence of ordinary as opposed to strict liability, the prosecution must be able to prove both a mens rea and an actus reus;i.e., a person cannot be guilty of the offence for one's actions alone. There must also be an appropriate intention, knowledge, recklessness, or criminal negligence at the relevant time (see concurrence). Recklessness may constitute an offense against property or involve significant danger to another person.