I used to think that we ought to do the best we can. After debating the issue with
Richard Chappell, doing some more research, and rereading some articles that I hadn’t read in awhile, I’ve changed my mind. The idea that we ought to do the best we can is plausible if we assume that ‘ought’ implies ‘can’ and nothing more restrictive than ‘can’. Consider that it is plausible to suppose that we ought to perform the best alternative, whatever the relevant set of alternatives is – at least, this is plausible so long as we presume, as I will, that the best alternative is to be understood in a theory-neutral way such that the best alternative is not necessarily the one that has the best consequences but is necessarily the alternative that is best according to the correct normative theory (i.e., the one that there is best/most reason to perform). But what is the relevant set of alternatives? I used to think that it was the set of alternatives that the agent can perform – call these ‘personally possible’. But what if ‘ought’ implies something more restrictive than ‘personally possible’? Suppose, for instance, that ‘ought’ implies ‘X’, where the set of alternatives that are X is a proper subset of those that are personally possible. If that’s true, then there would be some acts that are personally possible for me but which I cannot be obligated to perform: those that are personally possible for me but not X. I now think that there is such an X and that X equals ‘securable’. Below the fold, I explain the notion and defend the claim that ‘ought’ implies ‘securable’.
Recent Comments