Thursday, November 02, 2006

A Dilemma for Deniers of a priori Intuition

In our Self-evidence reading group, Earl has several times expressed skepticism about there being a phenomenology associated with a priori intuition (what we'll call the mode of grasping a self-evident proposition). A couple of times he's seemed to indicate that, parallel to Hume's statement about the self, he just doesn't see anything when he looks inside for such things.

It could be that in the back of his mind is something like the following assumption.

(FA1) Necessarily, for every experience E, E's phenomenal character is constituted by at least one of the sensuous characters associated with the five sensory modalities and my nothing else.

I think (FA1) pretty clearly false though, so I'm not sure what Earl is thinking. I here offer a dilemma on behalf of such qualia.

Definitions
D1 Necessarily, for any experience E, E has phenomenal character just in case there's something it's like to have that experience.
D2. Necessarily, for any experience E, E's phenomenal character is what it feels like to host E.
D3. A phenomenal concept =df a concept one can have only by being in a certain experience.

Argument A
1. Either there's something it's like to grasp the validity of modus ponens.
2. If there is not something it's like to grasp the validity of modus ponens, then no one has ever known they've grasped modus ponens.
3. But some have known they've grasped modus ponens.
4. Thus, there's something it's like to grasp modus ponens.


In a forthcoming paper Rich and Earl say that one's evidence that one is frustrated can include "a palpable sense of your own frustration". Now "palpable" is ambiguous in just the way "felt" is. It can mean felt with the five senses or felt in some broader sense. I see no reason to think that one could not have evidence that one is frustrated apart from how one looks, smells, sounds, feels, or tastes to oneself (though one can have such evidence).

It could be that the ambiguity is there on purpose to put off discussion of phenomenology, but I think such cases depend on introspective phenomenology and so we've got a more general dilemma stemming from all the things we think we know that we wouldn't if introspective phenomenology didn't provide evidence.

Self-evident but False

I've been thinking about our discussion of Audi's "Self-Evidence" a bit more (but just a bit) and I can now see no compelling reason to think that there can't be self-evident but false propositions. Furhtermore, I don't see that anything of any especial value is lost as a result.