“It is impossible to defeat an ignorant man in argument.”
“A defeated argument that refuses to be obliterated can remain very alive.”
“Ignorance is of a peculiar nature; once dispelled, it is impossible to reestablish it. It is not originally a thing of itself, but is only the absence of knowledge; and though man may be kept ignorant, he cannot be made ignorant.”
“All logical arguments can be defeated by the simple refusal to reason logically”
“Discussion is an exchange of knowledge; argument an exchange of ignorance.”
“There is a principle which is a bar against all information, which is proof against all arguments, and which cannot fail to keep a man in everlasting ignorance - that principle is contempt prior to investigation.”