This document discusses genres in film. It defines genre as a system of symbols or themes that allow audiences to recognize certain expectations within a style, like westerns being associated with cowboys and desert landscapes. Genres can be flexible and combine elements, like Terminator 2 blending science fiction and human/robot themes. Common film genres mentioned include science fiction, horror, comedy, action, war, and western. Science fiction is described as future-oriented and dystopian. Horror uses dark settings and sudden scares. Comedy genres vary but Dumb and Dumber exemplifies stupid humor.