To say that one thing A is intrinsically better than another thing B, according to Chisholm, is just to say that, for any person, x, contemplation of just A and B by x requires that x prefer A to B. Consider the fact that there are stones. While of course we might be glad that there are stones in virtue of their usefulness, it would not be correct to love this state of affairs for its own sake. Mere contemplation of this state of affairs does not require either love or hate. It seems to be intrinsically neutral. An intrinsically good thing is one that is intrinsically better than a neutral thing; an intrinsically bad thing is one such that an intrinsically neutral thing is intrinsically better than it. Thus according to Chisholm we may define intrinsic goodness, badness, and neutrality entirely in terms of preference and requirement.