To constitute a crime, there must be an "actus reus" (Latin for "guilty act") accompanied by the "mens rea" (see concurrence). Negligence shows the least level of culpability, intention being the most serious, and recklessness being of intermediate seriousness, overlapping with gross negligence. The distinction between recklessness and criminal negligence lies in the presence or absence of foresight as to the prohibited consequences. Recklessness is usually described as a "malfeasance" where the defendant knowingly exposes another to the risk of injury. The fault lies in being willing to run the risk. But criminal negligence is a "misfeasance" or "nonfeasance" (see omission), where the fault lies in the failure to foresee and so allow otherwise avoidable dangers to manifest. In some cases this failure can rise to the level of willful blindness, where the individual intentionally avoids adverting to the reality of a situation. (In the United States, there may sometimes be a slightly different interpretation for willful blindness.) The degree of culpability is determined by applying a reasonable-person standard. Criminal negligence becomes "gross" when the failure to foresee involves a "wanton disregard for human life" (see the definitions of corporate manslaughter and in many common law jurisdictions of gross negligence manslaughter).