A paradox of deontic logic, whereby the plausible statements (i) if you murder, you ought to murder gently, (ii) you do commit murder, and (iii) to murder gently you must murder imply the less plausible statement (iv) you ought to murder.

(UK, law enforcement) A process by which a witness confirms the identity of a criminal suspect, by viewing the suspect together with other people who were not involved in the crime.

Synonym of parakeet auklet

plural of parakeet auklet

A bird, Aethia psittacula, native to the islands and coast of Alaska.

plural of parakeet auk

A style of trousers characterized by the use of nylon, especially ripstop nylon, associated with breakdancing culture in the 1980s.

(statistics) A parameter of the distribution of a population that is not directly relevant to solving the significance test or estimate problem under consideration.

The observation that at the species level, the incidence of cancer does not appear to correlate with the number of cells in an organism.

A comet whose orbit is parabolic and so makes only a single visit to the inner solar system