On the one hand, logic is the study of certain mathematical properties of artificial, formal languages. It is concerned with such languages as the first or second order predicate calculus, modal logics, the lambda calculus, categorial grammars, and so forth.
Underworld is a 2003 action horror film directed by Len Wiseman about the secret history of Vampires and Lycans (an abbreviated form of lycanthrope). It is the first (chronologically, the second) installment in the Underworld series. The main plot revolves around Selene (Kate Beckinsale), a vampire Death Dealer hunting Lycans.
It is considered by most crime historians to be the earliest organized crime summit held in the US. The conference had a major impact on the future direction of the criminal underworld and it held more importance and significance than the Havana Conference of 1946 and the Apalachin meeting of 1957.