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Syllogistic fallacies – logical fallacies that occur in syllogisms. Affirmative conclusion from a negative premise (illicit negative) – a categorical syllogism has a positive conclusion, but at least one negative premise. [11] Fallacy of exclusive premises – a categorical syllogism that is invalid because both of its premises are negative ...
List of fallacies with clear examples, infidels.org; Interactive Syllogistic Machine A web based syllogistic machine for exploring fallacies, figures, and modes of syllogisms. Logical Fallacies and the Art of Debate, csun.edu; Stephen Downes Guide to the Logical Fallacies, onegoodmove.org; Explain fallacies, what they are and how to avoid them ...
Fallacies are usually divided into formal and informal fallacies. Formal fallacies are unsound because of their structure, while informal fallacies are unsound because of their content. [3] [4] [1] [5] The problematic content in the case of the false dilemma has the form of a disjunctive claim: it asserts that one among a number of alternatives ...
Formal fallacies are deductively invalid arguments. [3] [6] [7] [8] They are of special interest to the field of formal logic but they can only account for a small number of the known fallacies, for example, for affirming the consequent or denying the antecedent.
The Spanish version of the book was reviewed by Rafael Martínez for Loffit, and it emphasized how effectively the book's lessons could be learned by listening to various debates heard every day on radio and television, identifying in them examples of logical fallacies that the book explains. [12]
Attacking Faulty Reasoning: A Practical Guide to Fallacy-free Arguments [1] is a textbook on logical fallacies by T. Edward Damer that has been used for many years in a number of college courses on logic, critical thinking, argumentation, and philosophy. It explains 60 of the most commonly committed fallacies.
While a logical argument is a non sequitur if, and only if, it is invalid, the term "non sequitur" typically refers to those types of invalid arguments which do not constitute formal fallacies covered by particular terms (e.g., affirming the consequent). In other words, in practice, "non sequitur" refers to an unnamed formal fallacy.
However, the logical validity of an argument is a function of its internal consistency, not the truth value of its premises. For example, consider this syllogism, which involves a false premise: If the streets are wet, it has rained recently. (premise) The streets are wet. (premise) Therefore it has rained recently. (conclusion)