Conversation so far:
What is the nature of mental states?
In his article Propositional Attitudes (1978), Jerry Fodor introduced the idea that mental states are relations between individuals and mental representations.
What was the first alternative hypothesis to the idea that mental states are relations between individuals and mental representations?
Jerry Fodor considers two alternative hypotheses. The first completely denies the relational character of mental states

Question: What was the second alternative hypotheses?
Self-contained rewrite: What was the second alternative hypothesis to the idea that mental states are relations between individuals and mental representations?