An opinion is a subjective* statement or thought about an issue or topic, and is the result of emotion or interpretation of facts. An opinion may be supported by an argument, although people may draw opposing opinions from the same set of facts. Opinions rarely change without new arguments being presented. However, it can be reasoned that one opinion is better supported by the facts than another by analysing the supporting arguments.
An opinion may be the result of a person's perspective, understanding, particular feelings, beliefs, and desires. In casual use, the term opinion may refer to unsubstantiated information, in contrast to knowledge and fact-based beliefs.