 Many representationalists hold that the theory not only preserves materialism while accommodating sensory qualities, but is the only very promising way of doing so. For the only viable alternative resolution of our Bertie dilemma seems to be belief in actual Russellian sense-data or at least in immaterial properties. The anti-materialist may not mind sense-data ontologically, but s/he will also inherit the nasty epistemological problems that Russell never succeeded in overcoming: If sensory experience presents us with sense-data and nothing but, the sense-data wall us off from whatever may be the rest of reality, and we are left with a justificatory gap between our beliefs about sense-data and our beliefs about the external world. 