👉 In logic, a "cogency" is a type of logical argument or statement that demonstrates a logical fallacy. A cogency is a logical fallacy in which the premises are not logically equivalent to each other and hence cannot be derived from the conclusion. For example, if one claims that all birds can fly because they have wings, but it's not true that all birds can fly because they have wings, then this is a type of argument where a cogency has been committed. A