where does the saying red herring come from
Red herring The origin of the expression is unknown. Conventional wisdom has long supposed it to be the use of a kipper (a strong-smelling smoked fish) to train hounds to follow a scent, or to divert them from the correct route when hunting; however, modern linguistic research suggests that the term was probably invented in 1807 by English polemicist William Cobbett, referring to one occasion on which he had supposedly used a kipper to divert hounds from chasing a hare, and was never an actual practice of hunters. The phrase was later borrowed to provide a formal name for the logical fallacy and literary device.