Phil 103 SP 11 Lecture 14 Logic and Science

Phil 103 SP 11 Lecture 14 Logic and Science - Logic and...

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Unformatted text preview: Logic and Reasoning Spring 2011 Professor Waskan Lecture 18 Logic and Science Not covered in text. You may wish to read 13-1, including the four examples and the discussion of them (To learn more, take Philosophy of Science) Refresher From If it rained an average amount then the crops were harvested on time. The crops werent harvested on time. We may conclude It isnt the case that it rained an average amount. Symbolic notation: R H ~H ~R Valid? Sound? Refresher From If it rained an average amount and the crops were largely free of destructive insects then the crops were harvested on time. The crops werent harvested on time. We may conclude It isnt the case that it rained an average amount and the crops were largely free of destructive insects. Symbolic notation: (R I) H ~H ~ (R I) ~R v ~I Refresher From If it rained an average amount and the crops were largely free of destructive insects and the temperature was about average and the crops were largely free of disease then the crops were harvested on time. The crops werent harvested on time. We may conclude It isnt the case that it rained an average amount and the crops were largely free of destructive insects and the temperature was about average and the crops were largely free of disease . Symbolic notation: (R I T D) H ~H ~ (R I T D) ~R v ~I v ~T v ~D Refresher From If it rained an average amount and the crops were largely free of destructive insects and the temperature was about average and the crops were largely free of disease then the crops were harvested on time. The crops werent harvested on time. We may conclude It isnt the case that it rained an average amount and the crops were largely free of destructive insects and the temperature was about average and the crops were largely free of disease . Symbolic notation: (R I T D) H ~H ~ [(R I) (T D)] (~R v ~I) v (~T v ~D) Logic of Scientific Investigation (Explanatory) Hypothesis a set of (one or more) statements made with the intent of explaining a set of happenings. H1 Earth is stationary; celestial bodies orbit Earth; planets move in epicycles. H2 Earth rotates once per day; orbits the Sun w/ planets. H3 God created the universe and its creatures in seven days. H4 Newtons laws apply to all bodies, including planets. H5 Combustion is the release of phlogiston from a body. H6 Combustion is the taking in of oxygen. Logic of Scientific Investigation Supposed Superiority of Science (a) Scientific hypotheses are different from other sorts of hypotheses (e.g., religious). (b) Science is different from other ways of finding out about the world (e.g., astrology, splatiomancy) in that it enables a determination of whether or not hypotheses are true....
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This note was uploaded on 05/09/2011 for the course IB 106 taught by Professor Punyasenaandmarcot during the Fall '10 term at University of Illinois at Urbana–Champaign.

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Phil 103 SP 11 Lecture 14 Logic and Science - Logic and...

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