High Quality Content by WIKIPEDIA articles! The title mnemonist (derived from the term mnemonic) refers to an individual with the ability to remember and recall unusually long lists of data, such as unfamiliar names, lists of numbers, entries in books, etc. Such individuals have also been described as possessing an eidetic memory, although whether such abilities are innate behaviour or somehow learned appears contentious. Individuals famed as mnemonists have become subjects of scientific inquiry.