«He does not seem to know what an argument is. He never uses arguments himself. He never troubles himself to answer the arguments of his opponents. It has never occurred to him, that a man ought to be able to give some better account of the way in which he has arrived at his opinions than merely that it is his will and pleasure to hold them. It has never occurred to him that there is a difference between assertion and demonstration, that a rumour does not always prove a fact, that a single fact, when proved, is hardly foundation enough for a theory, that two contradictory propositions cannot be undeniable truths, that to beg the question is not the way to settle it, or that when an objection is raised, it ought to be met with something more convincing than 'scoundrel' and 'blockhead'»