background preloader

Logic fallacies

Facebook Twitter

Home page | Some paradoxes - an anthology - StumbleUpon. A Handbook of Rhetorical Devices. Robert A. Harris Version Date: January 19, 2013 This book contains definitions and examples of more than sixty traditional rhetorical devices, (including rhetorical tropes and rhetorical figures) all of which can still be useful today to improve the effectiveness, clarity, and enjoyment of your writing.

Note: This book was written in 1980, with some changes since. The devices presented are not in alphabetical order. To go directly to the discussion of a particular device, click on the name below. If you know these already, go directly to the Self Test. A Preface of Quotations Whoever desires for his writings or himself, what none can reasonably condemn,the favor of mankind, must add grace to strength, and make his thoughts agreeable as well as useful. Men must be taught as if you taught them not; And things unknown propos'd as things forgot. Style in painting is the same as in writing, a power over materials, whether words or colors, by which conceptions or sentiments are conveyed. 1.

Best of thinking skills

A List Of Fallacious Arguments. Attacking the person instead of attacking his argument. For example, "Von Daniken's books about ancient astronauts are worthless because he is a convicted forger and embezzler. " (Which is true, but that's not why they're worthless.) Another example is this syllogism, which alludes to Alan Turing's homosexuality: Turing thinks machines think. (Note the equivocation in the use of the word "lies".) Iib_rhetological_fallacies_EN.png (PNG Image, 1276 × 6157 pixels) - Scaled (10%) List of fallacies. A fallacy is incorrect argument in logic and rhetoric resulting in a lack of validity, or more generally, a lack of soundness. Fallacies are either formal fallacies or informal fallacies. Formal fallacies[edit] Main article: Formal fallacy Appeal to probability – is a statement that takes something for granted because it would probably be the case (or might be the case).[2][3]Argument from fallacy – assumes that if an argument for some conclusion is fallacious, then the conclusion is false.Base rate fallacy – making a probability judgment based on conditional probabilities, without taking into account the effect of prior probabilities.[5]Conjunction fallacy – assumption that an outcome simultaneously satisfying multiple conditions is more probable than an outcome satisfying a single one of them.[6]Masked man fallacy (illicit substitution of identicals) – the substitution of identical designators in a true statement can lead to a false one.

Propositional fallacies[edit]