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Week 1- Philosophy

by: Jonathan Notetaker

Week 1- Philosophy PHL-101-01

Jonathan Notetaker
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About this Document

These notes cover all of the basic concepts and definitions of logic.
Intro to Logic
Dr. Di Fate
Class Notes
philosophy, logic




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This 1 page Class Notes was uploaded by Jonathan Notetaker on Tuesday September 13, 2016. The Class Notes belongs to PHL-101-01 at Spring Hill College taught by Dr. Di Fate in Fall 2016. Since its upload, it has received 5 views. For similar materials see Intro to Logic in Philosophy at Spring Hill College.


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Date Created: 09/13/16
Validity and Soundness - “validity preserves truth” o If you start with truth and argue validly, you will end with truth Definitions - Logic= study of methods for evaluating whether the premises for an argument support its conclusion - Argument= set of statements where some statements (premises) intend to support another (conclusion) - Statement= sentence that is either true or false - Deductive Argument= premises are intended to guarantee the argument - Inductive Argument= premises make conclusion probable without guaranteeing it - Valid Argument= it is necessary that if premises are true then so is conclusion (the conclusion follows from the premises) - Invalid argument= it is not necessary that the premises are true and the conclusion is true (conclusion does not follow from the premises - Sound Argument= valid argument when all premises are true and conclusion too - Unsound argument= one that is invalid or at least one premises is false Examples - Invalid o Di Fate is a professor at Princeton  Di Fate has a PhD - Valid o Di Fate is a professor at Princeton  Di Fate is employed by an ivy league school - Sound Argument o All bodies in the universe gravitate towards all other bodies in the universe o Our bodies are bodies in the universe  We gravitate towards one another Sound arguments are the only way by which we get true facts or in other words… knowledge


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