1 Circulation (fluid dynamics), the path integral of the fluid velocity around a closed curve. 2  Circulation (journal), a journal published by the American Heart Association.  Atmospheric circulation, the large-scale movement of air.
An informal fallacy is an argument whose stated premises fail to support their proposed conclusion. Informal fallacies often come about because of an error in reasoning. The premises are then erroneously linked to the conclusion. In contrast to a formal fallacy, the error has to do with issues of inference because language is used to state the propositions; natural language allows to say more than the symbolism of formal logic can represent.
Informal. a person who is notably stupid or lacking in good judgment: I wonder why they elected that narrow-minded moron to Congress.