phi_lec_3

phi_lec_3 - Lecture 3 – April 6 2010 One reply to the...

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Unformatted text preview: Lecture 3 – April 6, 2010 One reply to the skeptical arguments A distinction: practical certainty vs. metaphysical certainty A reply A belief b is PRACTICALLY JUSTIFIED for a person s at time t if and only if at t, s has enough justification for b for the practical purposes of ordinary life A belief b is metaphysically certain/metaphysically justified for s at time t if and only if at t, s has enough justification for b for the purposes of “the search for truth” • • Two corresponding grades of knowledge: Practical knowledge Metaphysical knowledge Rene Descartes - Wa nt s m e t a p h y sic al jus tific a tio n - Philos o p h e r a n d m a t h e m a tici a n (Car t e si a n c o or din a t e s) - Arg u e d s o ul is a s e p a r a t e e n tity fro m t h e b o d y First m e dit a tio n D e s c a r t e s w a n t s t o b e c o m e “ e pi s t e mic ally p u rifie d” X is e pi s t e mi c ally p u rifi e d a t ti m e t = df. Ev ery pr e p o sitio n t h a t x b eli e v e s a t t is a pr o p o siti t h a t h e m e t a p h-kn o w s a t ti m e t. … a n d w a n t s t o b e ‘m a xi m ally e pi s t e mic ally p u rifie d’ i. e.: h a v e t h e ric h e s t, m o s t c o m pl e t e s e t of b eli efs t h a t it’s p o s si bl e for hi m t o h a v e , giv e n t h i s b eli ef s m u s t b e m e t a p h y sic ally c e r t ai n for hi m Thr e e • • • Arg u m e n t s fro m Me d. 1 Th e Argu m e n t fro m S e n s e D e c e p tio n Th e Dr e a m Argu m e n t Th e D e c e p tiv e Go d Arg u m e n t Ea c h o n e h a s t h e followin g s t a t e m e n t a s its c o n clu sio n: Now is t h e ti m e w h e n I m u s t r efr ai n fro m b eli evin g e v e r y t hi n g t h a t I for m e rly b eli e v e d . ...
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This note was uploaded on 09/13/2011 for the course PHI 1 taught by Professor Glanzberg during the Spring '09 term at UC Davis.

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