 In chapter 11 and 12, the Christian philosopher presents the skeptical arguments in a new and more radical form. He gives an account of the ten skeptical tropes of Aenesideme, as Mersenne could have read them in Sextus Empiricus and Diogène Laertius. These tropes draw on the varieties of animal constitution in regard pleasures and pains, the idiosyncrasy of men, the disagreement of the senses, the varieties of circumstances and dispositions, such as health and disease, sleep and wakefulness, young age and old age. All show that the information of our senses is unreliable, just as the reasons we draw from them.