 In a later essay (Fodor 1991), Fodor defends a weaker and more complicated version of the second premise. He suggests that there are some extrinsic properties, such as being a planet, that affect causal powers, and others, like being part of a universe in which a certain coin toss comes out heads, that are irrelevant to causal powers. He then offers a criterion for distinguishing between causally relevant extrinsic properties and causally irrelevant extrinsic properties: roughly, an extrinsic property is causally irrelevant to outcomes that it is logically connected to. He then argues that broad content does not satisfy the criterion for being a causally relevant extrinsic property. (It should be noted that in still more recent work (Fodor 1995, Chapter 2), Fodor has abandoned the idea that narrow content is important for psychology.)