A formal system is a set of symbols and rules for manipulating them, used to derive statements or theorems in…
A formal proof is a rigorous demonstration of truth within a formal system. Each step is precisely justified by a…
A formal fallacy is a flaw in the structure or form of an argument, distinct from errors in its content.…
A formal consequence is a conclusion derived solely from the logical form of propositions, independent of their content. It contrasts…
A syllogistic figure refers to the arrangement of the major and minor terms in a categorical syllogism. It's crucial for…
A logical error in syllogistic reasoning where an argument improperly uses four distinct terms instead of the required three, rendering…
The fallacy of division is a logical error where one wrongly assumes that characteristics of a whole apply to its…
Existential instantiation is a logical rule enabling the inference of a specific individual's existence from a generic existential statement. It's…
An E-proposition, in traditional logic, is a universal negative categorical statement. It asserts that no members of one class are…
Entailment defines the logical connection where true premises guarantee a true conclusion. It's fundamental to deductive reasoning, ensuring that if…