ocr: Logic is the science or art ofreasoning. Formallogic is - a system ofi finference [see inference], generalization, and demonstration, but at its simplest, saying that an argument has "good logic" - means that it makes sense -that the claims lead you step by step to the conclusion. This poster uses a classicalform, the syllogism [see syllogism], that consists ofa major claim (trees prevent wind erosion), a minor claim that is unstated here (farms on the plains suffer from wind erosion), and a conclusion (plains farms needtrees). Of course, most arguments you encounter are much more complicated ...
