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Edmund L. Gettier III and his problem
3
What is Justified True Belief?
Is justified true belief knowledge?
Gettier's First
And second challenges
-Justified true belief is what philsophers used as definition of knowledge since Plato
-States that in order to know a proposition is true you need to A) believe it and B) have justification
-Title of his 1963 paper
-Challenged what the accepted definition of knowledge was
Example
Biography
P1.Kangaroos don't have wings
P2. I believe that kangaroos don't have wings
P3. I have never seen a kangaroo with wings.
C. I KNOW kangaroos don't have wings.
Questions
-Born on October 31st 1927
-Mentored by Max Black and Norman Malcolm.
-Ph.D. from Cornell 1961
-Now Teaches at UMass since 1967
1. What were the three conditions for JTB
2.Which philosopher is credited with JTB?
3. How many cases did Gettier give
A subject, S, can only believe a proposition, P, is true if
i. P is true
ii. S believes P is true
iii. S has justification that P is true.