Straw man argument

A straw man is a common form of argument and is an informal fallacy based on giving the impression of refuting an opponent's argument, while actually refuting an argument that was not presented by that opponent. One who engages in this fallacy is said to be "attacking a straw man."

The typical straw man argument creates the illusion of having completely refuted or defeated an opponent's proposition through the covert replacement of it with a different proposition (i.e., "stand up a straw man") and the subsequent refutation of that false argument ("knock down a straw man") instead of the opponent's proposition.

This technique has been used throughout history in polemical debate, particularly in arguments about highly charged emotional issues where a fiery "battle" and the defeat of an "enemy" may be more valued than critical thinking or an understanding of both sides of the issue.

Straw man tactics in the United Kingdom can be known as an Aunt Sally, after a pub game of the same name, where patrons threw sticks or battens at a post to knock off a skittle balanced on top.

As a fallacy, the identification and name of straw man arguments are of relatively recent date, although Aristotle makes remarks that suggest a similar concern;Douglas Walton identified "the first inclusion of it we can find in a textbook as an informal fallacy" in Stuart Chase's Guides to Straight Thinking from 1956 (p. 40). However, Hamblin's classic text Fallacies (1970) neither mentions it as a distinct type, nor even as a historical term.

The term's origins are unclear. The usage of the term in rhetoric suggests a human figure made of straw that is easy to knock down or destroy—such as a military training dummy, scarecrow, or effigy. A common folk etymology is that it refers to men who stood outside courthouses with a straw in their shoe to signal their willingness to be a false witness.

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