On the tracking account of inferential knowledge

Nozick has an account of inferential knowledge which has rarely been discussed. According to this account, in order to know q via competent inference from p, S’s belief in q should track the truth of p in the right way. In detail, S knows via competent inference from p that q iff1*. S knows that p.2*. q is true, and S infers q from p.3*. If q were false, S wouldn’t believe that p.4*. If q were true, S would believe that p.In this paper, it is argued that the account is problematic. It is both too restrictive and too inclusive. It is too restrictive because condition 4* is not satisfied in some cases of inferential knowledge. It is too inclusive because condition 3*, together with other conditions, could be easily satisfied in some cases where inferential knowledge does not exist.