Genre (Pronounced /(d)ʒɑn.ɹə/) (from French genre, meaning 'kind, sort') is any form or type of communication in any mode (written, spoken, digital, artistic, etc.) with socially-agreed-upon conventions developed over time. Genre is most popularly known as a category of literature, music, or other forms of art or entertainment, whether written or spoken, audio or visual, based on some set of stylistic criteria, yet genres can be aesthetic, rhetorical, communicative, or functional. Genres form by conventions that change over time as cultures invent new genres and discontinue the use of old ones. Often, works fit into multiple genres by way of borrowing and recombining these conventions. Stand-alone texts, works, or pieces of communication may have individual styles, but genres are amalgams of these texts based on agreed-upon or socially inferred conventions. Some genres may have rigid, strictly adhered-to guidelines, while others may show great flexibility. Genre began as an absolute classification system for ancient Greek literature, as set out in Aristotle's Poetics. For Aristotle, poetry (odes, epics, etc.), prose, and performance each had specific design features that supported appropriate content of each genre. Speech patterns for comedy would not be appropriate for tragedy, for example, and even actors were restricted to their genre under the assumption that a type of person could tell one type of story best. In later periods[when?] genres proliferated and developed in response to changes in audiences and creators. Genre became a dynamic tool to help the public make sense out of unpredictable art. Because art is often a response to a social state, in that people write/paint/sing/dance about what they know about, the use of genre as a tool must be able to adapt to changing meanings. Genre suffers from the ills of any classification system. It has been suggested[by whom?] that genres resonate with people because of the familiarity, the shorthand communication, as well as because of the tendency of genres to shift with public mores and to reflect the zeitgeist. While the genre of storytelling has been relegated[by whom?] as lesser form of art because of the heavily borrowed nature of the conventions, admiration has grown. Proponents[who?] argue that the genius of an effective genre piece is in the variation, recombination, and evolution of the codes.