 Foundationalism regarding justification is often motivated by some version of the regress argument. (Foundationalism regarding knowledge can be motivated by a parallel version of the regress argument, put in terms of knowledge rather than justification.) The argument goes roughly as follows. By definition, any belief B that is an instance of nonfoundational or inferential justification must depend on some inference or inferential relation to other beliefs. It seems that this dependence on other beliefs must take one of four forms: (i) the belief depends inferentially on other beliefs, and the latter beliefs on yet other beliefs, to infinity; (ii) the inference eventually loops back to belief B, so that B depends on itself for its justification; (iii) the belief ultimately depends on other beliefs that are not themselves justified; or (iv) the belief ultimately depends on a foundationally justified belief: a belief that is justified but that does not depend on other beliefs for its justification. The foundationalist argues that each of the alternatives to (iv) is seriously problematic: (i) An infinite regress is vicious, and even if it isn’t, this is no help for finite minds like our own. (ii) Circular reasoning is vicious; one cannot depend, even in part, on a belief that p in order to justify believing that p. (iii) One cannot generate justification by relying on unjustified beliefs (“garbage in, garbage out!”). So that leaves (iv): if any of our beliefs are justified, then they must either be foundationally justified or depend, ultimately, on foundational beliefs for their justification.