  That is, Bennett thinks that there is some trans-attribute feature (what he calls “differentia F”) such that it can be added to Extension to get extended-F, and added it to Thought to get thinking-F. Bennett admits that nothing like this is found anywhere in the text, but he believes that this way we can make sense of Spinoza’s holding that the attributes are “really distinct” from each other and, at the same time, that thinking-F and extended-F are one and the same.