In perception, what is the immediate object of experience? 


BonJour's perceptual subjectivism.

Contrast with direct realism.


1.  The argument from illusion, hallucination, and perceptual relativity.


BonJour's Extension of the Argument:  the combination of "true" and "false" qualities.


The indiscernibility claim.


2.  The Causal or Scientific Argument.
















How is Perceptual Knowledge Possible?


1.  Representationalism (e.g., Locke's Causal Theory of Perception). 

        Locke's distinction between primary and secondary qualities.

        The "permanent picture gallery" objection.



2.  Berkeley's Causal Theory of Perception as one form of Idealism.

        Denies the distinction between primary and secondary qualities. 


3.  Phenomenalism

        BonJour attributes this view to Hume.  It is better attributed to Mill who speaks of objects as "permanent possibilities of sensation".

        According to BonJour, how does phenomenalism differ from Berkeley's idealism?

        Why does phenomenalism lead to skepticism about other minds?


4.  Direct Realism