 This is the proposition that is analyzed and critiqued by Thomas Aquinas in his De unitate intellectus contra Averroistas (1269) [TUIA]. It is also closely related to the celebrated doctrine of double truth imputed to the Latin Averroists by their Franciscan opponents. Bacon’s arguments, like those of Aquinas, deal specifically with philosophical reasons for the mistaken positions of the Averroists. The first two arguments are moral arguments: if there were one identical intellect in all humans, the same person would be both virtuous and vicious. The denial that ‘this individual human thinks’ is contrary to both philosophy and faith. This is contrary to the Nicomachean Ethics and would lead to a destruction of moral philosophy.