Arguments containing informal fallacies may be formally valid, but still fallacious. As an informal fallacy, the red herring falls into a broad class of relevance fallacies. This history helps explain why measurement fallacies are informed by informal logic and argumentation theory. Argumentation theory provides a different approach to understanding and classifying fallacies. He also devoted much effort in refuting fallacies and paradoxes. It features short articles about cognitive biases and logical fallacies. Socrates dictates a complete textbook of logical fallacies to the bewildered Theaetetus. Manimekalai contains a long exposition of fallacies of logic. Specific types of dialogue can be analyzed and questioned to reveal premises, conclusions, and fallacies. Cherry picking can be found in many logical fallacies. The study of fallacies is an important branch of informal logic. The phrase "emperor's new clothes" has become an idiom about logical fallacies. In this way it could be similar to the misleading vividness or slippery slope fallacies. It falls into the broad class of relevance fallacies. She also insisted academic freedom and university autonomy were no excuse for propagating fallacies.