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Feasibility Theory

Published on Nov 21, 2015

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PRESENTATION OUTLINE

DEFEASIBILITY THEORY

DOES IT SOLVE THE GETTIER PROBLEM?
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DOES THE DEFEASIBILITY THEORY SOLVE

THE GETTIER PROBLEM

VIRTUES OF THE DEFEASIBILITY THEORY PRESERVES STRUCTURE OF TRADITIONAL ANALYSIS

LITTLE FOCUS ON QUALITY OF JUSTIFICATION
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AGENDA

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AGENDA...

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THE GETTIER PROBLEM:

EPISTEMOLOGICAL LUCK
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THE GETTIER PROBLEM:

EPISTEMOLOGICAL LUCK
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SMITH BELIEF:

"THERE IS A FORD OWNER IN MY OFFICE"
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SMITH BELIEF:

"THERE IS A FORD OWNER IN MY OFFICE"
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SMITH'S JUSTIFICATION

SMITH's JUSTIFICATION

HENRY DRIVES A FORD...
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SMITH IS RIGHT...

THERE IS A FORD OWNER IN HIS OFFICE
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HENRY F's SCREEN SAVER

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DOES SMITH HAVE KNOWLEDGE

THAT THERE IS A FORD OWNER IN HIS OFFICE?
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SMITH IS RIGHT

THERE IS A FORD OWNER IN HIS OFFICE
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Untitled Slide

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DOES SMITH HAVE KNOWLEDGE

THAT THERE IS A FORD OWNER IN HIS OFFICE?
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SMITH HAS WON...

...THE EPISTEMOLOGICAL LOTTERY!
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Untitled Slide

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HENRY F. OWNS A FERRARI

SMITH HAS WON

THE EPISTEMOLOGICAL LOTTERY!
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SMITH'S OTHER COLLEAGUE OWNS A FORD

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HENRY F. OWNS A FERRARI

SO WHAT?

SMITH'S OTHER COLLEAGUE OWNS A FORD

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HENRY F. DOES NOT OWN A FORD!

WE NEED TO REVISE TRADITIONAL ANALYSIS OF KNOWLEDGE
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SO WHAT?

THEORY OF KNOWLEDGE

S KNOWS p iff

HENRY F DOES NOT OWN A FORD

WE NEED TO REVISE TRADITIONAL ANALYSIS OF KNOWLEDGE!
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THEORY OF KNOWLEDGE

DEFEASIBILITY THEORY

THE PROBLEM WITH SMITH'S CONCLUSION: THERE IS A STATEMENT THAT DEFEATS HIS JUSTIFICATION

ONE VERSION OF DEFEASIBILITY THEORY:

DEFEASIBILITY THEORY

THE PROBLEM WITH SMITH'S CONCLUSION

WHAT IS SO SPECIAL...

ABOUT DEFEASIBILITY THEORY?
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ONE VERSION OF DEFEASIBILITY THEORY:

WHAT IS SO SPECIAL.

ABOUT DEFEASIBILITY THEORY?
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THE DIAGNOSIS!

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THE DIAGNOSIS!

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A DEFEATING PROPOSITION

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A DEFEATING PROPOSITION

2 COMPETING IDEAS

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