Abstract
In the introduction to his account of the debate concerning religion between Cleanthes, Philo and Demea, Pamphilus remarks that ‘reasonable men may be allowed to differ where no one can reasonably be positive’. Pamphilus goes on to suggest that natural theology is an area that abounds with issues about which ‘no one can reasonably be positive’. Assuming that the beliefs of reasonable men are themselves reasonable, Pamphilus can be interpreted as holding that If no one is reasonably positive that the proposition p is true or that it is false, a man might reasonably believe that p or might reasonably believe that not p