Declan SmithiesThis paper begins from the assumption that perception plays an epistemic role in justifying beliefs about the external world. The aim of the paper is to explain how perception succeeds in playing this epistemic role. What is it about perception in virtue of which it justifies beliefs about the external world?The debate between internalism and externalism in the epistemology of perception can be defined in many different ways, but one key point of contention is the epistemic role of phenomenal character. This is my main focus here. So for the purposes of this paper, internalism is the thesis that perception justifies belief solely in virtue of its phenomenal character, while externalism is the thesis that perception justifies belief at least partly in virtue of externalist facts about perception that are distinct from its phenomenal character. Proponents of internalism and externalism, so defined, can agree that perception justifies beliefs about the external world, but they disagree about how it does so. This paper represents something of a change in view. Although I have defended internalism in previous work, this paper makes a modest concession to externalism. 1 At the same time, my goal is argue that externalism can depart from the letter of internalism while retaining much of its spirit. To this end, I propose a moderate version of externalism on which externalist facts play a justifying role, but only insofar as they impact on the representational content of perception. This is to be contrasted with more radical versions of externalism on which externalist facts about perception play a justifying role that need not be reflected in its representational content. The main goal of the paper is to explain why a modest concession to externalism need not open the floodgates to more radical versions of 1 In Smithies 2006 and 2014, I defend an internalist theory on which justification depends upon phenomenal character alone. To avoid false advertising, I should note that the proposal defended in this paper qualifies as internalism by many familiar definitions, including mentalism and access internalism. 2 externalism. More specifically, I argue that epistemic level--bridging principles provide a principled rationale for keeping the floodgates closed.The first four sections of the paper examine the connection between the phenomenal character of perception and its justifying role. Section one argues that phenomenal character is a necessary condition for perception to justify belief.Section two argues that phenomenal character is a difference--maker for perceptual justification in the sense that any difference in the phenomenal character of perception makes for some corresponding difference in its justifying role. Section three argues that phenomenal character is not the only difference--maker for perceptual justification, since its justifying role can differ with no corresponding difference in its phenomenal character. Section four presents a moderate version of externalism on which phenomenal character...