Logic and Logical Fallacies

Logical Fallacies are errors--sometimes inadvertent, sometimes deliberate, that skew the logic of an argument.  You might know of a few (e.g., ad hominem: attacking an opponent's character instead of his argument, or post hoc, prompter hoc: confusing correlation with causation), but these resources will introduce you to a litany of fallacies to help you avoid them in your own writing and identify them in others' arguments.

  • Your Logical Fallacy is... in a nicely designed format, this site defines 24 common logical fallacies. Hover over the buttons for a quick definition, or click on them for a more thorough explanation and some examples. Includes a printable poster listing all 24.
  • Fallacies (part of the Nizkor Project) is a comprehensive guide to 42 logical fallacies.
  • Writing in College: A Short Guide to College Writing by Joseph M. Williams and Lawrence McEnerney (Univ. of Chicago): This valuable and concise guide for students making the transition from high school to college writing discusses crafting an argument, making a point, and understanding professors' expectations.
  • What is an Academic Paper? (Dartmouth) Another valuable introduction to college-level writing, this guide includes sections on and Using Appropriate Tone and Style.