2010.10.12 - Agenda Tue 12 Oct and Thu 14 Oct Truth-table...

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Agenda Tue 12 Oct and Thu 14 Oct • Truth-table test for green reason bubble deductive validity correctness • Application to famous examples • Pascal wager • Galilo falling bodies
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Course Goals • General goals, skills • Skill Identifying reasoning, arguments • Skill Separating reasoning, arguments, into important parts • Skill Evaluating when reasoning, arguments, correct, incorrect Now doing Applying to famous examples
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Today Thu 14 Oct • Truth-table test for green reason bubble deductive validity correctness • Application to famous examples • Pascal wager
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Today Agenda Part 2 Thu 07 Oct • Truth-table test for green reason bubble deductive validity correctness • Application to famous examples • Hume God evil
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Correctness Reasoning GRM ch 6.1 • Two aspects, parts • Reason bubble: Concerns Relation premises to conclusion • Premises boxes: Concerns Truth, "acceptability", premises Correct? Incorrect? All correct? Some incorrect?
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Example5 Hume, Dialogues , part X
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Today Tue 12 Oct • Truth-table test for green reason bubble deductive validity correctness • Application to famous examples Pascal wager • Galileo falling bodies
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Slide 8 Pascal’s Wager Intro
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Hitchens Pascal Wager 0-1.20
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Oscar and Lucinda • Oscar who • Lucinda who • Lucinda confession sin gambling. Oscar gambles.
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Oscar and Lucinda
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Pascal’s Wager Pascal Words • “ …"god is, or He is not." But to which side shall we incline? Reason can decide nothing here. A game is being played at the extremity of this infinite distance where heads or tails will turn up. What will you wager? According to reason…you can defend neither of the propositions.”
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Table Pascal's Wager Lead life of believer (includes believe Christian God exists) NOT Lead life of believer (includes believe Christian God exists) prob>0 prob>0
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Pascal’s Wager Pascal Words • “ Which will you choose then? Let us weigh the gain and the loss in wagering that god is. Let us estimate these two chances. If you gain, you gain all; if you lose, you lose nothing. Wager, then, without hesitation that He is.”
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Pascal's Wager Dominance Version Lead life of believer (includes believe Christian God exists) NOT Lead life of believer (includes believe Christian God exists) Outcome Saved. No other result. Infinite value Outcome Not saved. No other result. x value (eg x=0) Outcome Not saved. No other result. x value (eg x=0) Outcome Not saved. No other result. x value (eg x=0)
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Pascal's Wager Reasoning Slide 16
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Dominance Rule • Suppose in each state • Value result from choosing C1 Value result from choosing C2,…,Cn • Then • Better to choose C1
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Dominance Eg • Weird lottery. Tickets free. Ticket T loses Ticket T wins Net result $1 cost + $0 win = -$1 Net result $1 cost + $100 win = Net result $0 cost + $0 win = $0 Net result $0 cost + $0 win = 0 0 0 >0 >0 100
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Dominance Eg • Weird lottery. Tickets free.
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This note was uploaded on 11/03/2010 for the course PHIL 120 taught by Professor Irvine during the Fall '10 term at The University of British Columbia.

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2010.10.12 - Agenda Tue 12 Oct and Thu 14 Oct Truth-table...

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