 According to Neander (2006) the configuration of visible features is the right style of visual content to ascribe for the purpose of mainstream scientific explanations of an anuran’s visual capacities (see also Neander 2017, ch. 5). Nor does this proposal seem to generate overly specific contents of the kind mentioned earlier in relation to Millikan’s biosemantics. On Neander’s theory, the frog does not represent the stimulus as not carrying an infectious disease, even if only those small, dark and moving things that were not carrying an infectious disease contributed to frog fitness when the frog was fed. Sensory-perceptual systems can only have been selected for causal dispositions which past systems of the type possessed. Since past systems had no disposition to respond preferentially to the absence of an infectious disease in visual stimuli that were small, dark and moving, the fact that contributions to fitness were made only on those occasions when an infectious disease was absent is, again, a background evolutionary fact that is not content-constitutive on this proposal.