Any naturalistic, purely causal, non-semantic account of content will have to rely on Darwinian natural selection to build neural states capable of storing unique propositions which is required by folk psychology. Theories that attempt to account for intentionality within materialism face the disjunction problem which results in the indeterminacy of propositional content. If such theories cannot solve the disjunction problem then it will be the case that neurons cannot store unique propositions. The only process that can build neural circuits, evolution by natural selection, cannot solve the disjunction problem. The whole point of Darwin's theory is that in the creation of adaptations, nature is not active, it's passive. What is really going on is environmental filtration—a purely passive and not very discriminating process that prevents most traits below some minimal local threshold from persisting. Natural selection is selection against. Literal selection for requires foresight, planning, and purpose. Darwin's achievement was to show that the appearance of purpose belies the reality of purposeless, unforesighted, and unplanned mindless causation. All adaptation requires is selection against. That was Darwin's point. But the combination of blind variation and selection-against is not possible without disjunctive outcomes.