Teleological Semantics

Teleological semantics is the naturalistic theory of mental content that grounds representational meaning in the biological or learned function of a state. On this view, a frog's neural firing pattern does not merely correlate with the presence of flies; it represents flies because it was selected by evolution (or shaped by learning) to serve the function of detecting flies. The content is fixed by the proper function, not by the actual causal history of each token state.

Ruth Millikan (1984) and Fred Dretske (1986) are the principal architects. Millikan's biosemantics treats content as a normative property: a state has the content it is supposed to carry, where 'supposed to' is defined by the selection history of the mechanism that produces it. Dretske's informational semantics adds that content requires a learning period during which the state carries natural information about the target, after which the state can misrepresent.

The central objection is the Swampman problem: a being created by lightning with no evolutionary or learning history would have no content on this view, yet it would behave indistinguishably from an evolved being. The reply — that function can be constituted by learning as well as evolution — weakens but does not eliminate the objection.