On the other hand, conservatives like Aristophanes continued to oppose the spread of education with acrimonious zeal. Some of their arguments have a curiously familiar ring. Intellectual pursuits, they said, were bad for the health, led to irreligion and immorality, made young people quite unlike their grandfathers, and were somehow or other connected with loose company and a fast life. This last insinuation was in one respect the very reverse of true. So far as personal morality went, nothing could be better for it than the change introduced by Protagoras from amateur to paid teaching. Before this time, a Greek youth who wished for something better than the very elementary instruction given at school, could only attach himself to some older and wiser friend, whose conversation might be very improving, but who was pretty sure to introduce a sentimental element into their relationship equally discreditable to both.[70] A similar danger has always existed with regard to highly intelligent women, although it may have threatened a smaller number of individuals; and the efforts now being made to provide them with a systematic education under official superintendence will incidentally have the effect of saving our future Héloises and Julies from the tuition of an Abélard or a Saint-Preux. It was their habit of teaching rhetoric as an art which raised the fiercest storm of indignation against Protagoras and his colleagues. The endeavour to discover rules for addressing a tribunal or a popular assembly in the manner best calculated to win their assent had originated quite independently of any philosophical theory. On the re-establishment of order, that is to say of popular government, in Sicily, many lawsuits arose out of events which had happened years before; and, owing to the lapse of time, demonstrative evidence was not available. Accordingly, recourse was had on both sides to arguments possessing a greater or less degree of probability. The art of putting such probable inferences so as to produce persuasion demanded great technical skill; and two Sicilians, Corax and Tisias by name, composed treatises on the subject. It would appear that the new-born art was taken up by Protagoras and developed in the direction of increased dialectical subtlety. We are informed that he undertook to make the worse appear the better reason; and this very soon came to be popularly considered as an accomplishment taught by all philosophers, Socrates among the rest. But if Protagoras merely meant that he would teach the art of reasoning, one hardly sees how he could have expressed himself otherwise, consistently with the antithetical style of his age. We should say more simply that a case is strengthened by the ability to argue it properly. It has not been shown that the Protagorean dialectic offered exceptional facilities for maintaining unjust pretensions. Taken, however, in connexion with the humanistic teaching, it had an unsettling and sceptical tendency.