'You must follow me carefully. I shall have to controvert one or two ideas that are almost universally accepted. The geometry, for instance, they taught you at school is founded on a misconception.''Is not that rather a large thing to expect us to begin upon?' said Filby, an argumentative person with red hair.'I do not mean to ask you to accept anything without reasonable ground for it. You will soon admit as much as I need from you. You know of course...