 This is very abstract. Here is an example of an employment of this approach. While Finnis now affirms Grisez’s master rule approach, in his 1980 work he defends various principles of practical reasonableness without adverting to a master rule. He argues, for example, that it is always wrong to intend the destruction of an instance of a basic good (Finnis 1980, pp. 118–123). (So, no lying, for lying is an intentional attack on knowledge; no murder, for murder is an intentional attack on life, and so forth.)  Why is it always wrong to do so?  It would be unreasonable simply to try to destroy an instance of a basic good, for no further purpose: for that would treat an instance of a basic good as something that it is not — that is, as valueless. And it would be wrong to destroy an instance of a basic good for the sake of bringing about some other instance of a basic good: for that would make sense only if the good brought about were more valuable than the good destroyed, but on Finnis’s view all distinct instances of basic goods are incommensurable — none is of more, less, or equal value with any other. So the rule forbidding intentional destruction of an instance of a basic good is justified because it rules out only choices that presuppose something false about the nature of the basic goods. (For a working out of the method approach, see Murphy 2001, ch. 5.)