List of Formal Logical Fallacies
Formal and Informal Fallacies
Logical Fallacies are usually divided into formal and informal. Formal fallacies occuring in Syllogisms are called Syllogistic fallacies.
- A valid argument is the one where if the premises are true, the conclusion must be true. it has a correct formal structure.
- A sound argument is in addition to being a formally correct argument, also contains true premises.
Ideally, the best kind of formal argument is a sound, valid argument. Formal logic checks only argument validity, not soundness, so can not solely be used to determine whether or not an argument is true.