 One advantage of Swain’s theory (which could be easily incorporated into many other theories of the basing relation) is that reasons are not limited to beliefs. Things like perceptual states (such as seeing something) or what Swain calls sensation states (such as experiencing hunger, thirst, pain, or other things which we sense but not necessarily through the five senses) are counted (by stipulation) as non-propositional reasons for the purposes of his theory. Thus, a unified account of belief basing is provided.