Modest Infinitism

Abstract

Infinitism, a theory of the structure of justification most recently developed and defended by Peter Klein, is the view that justification is a matter of having an infinite series of non-repeating reasons for a proposition. I argue that infinitism is preferable to foundationalism in that only infinitism can plausibly account for two important features of the structure of justification: 1) justification admits of degrees and 2) complete justification makes sense.