An [[Wikipedia:Writing better articles#Information style and tone|encyclopedic style]] with a [[Wikipedia:Writing better articles#Tone|formal tone]] is important: straightforward, [[Wikipedia:Summary style|just-the-facts]], instead of essay-like, araaaagumentativeargumentative, or opinionated. The goal of a Wikipedia article is to create a comprehensive and [[Wikipedia:Neutral point of view|neutrally written]] summary of existing mainstream knowledge about a topic. Wikipedia does not publish [[Wikipedia:No original research|original research]]. An encyclopedia is, by its nature, a [[tertiary source]] that provides a survey of information already published in the wider world. Ideally, all information should be [[Wikipedia:Citing sources|cited]] and [[Wikipedia:Verifiability|verifiable]] by [[Wikipedia:Reliable sources|reliable sources]]. Sourcing requirements are significantly stricter in [[Wikipedia:Biographies of living persons|articles on living persons]].