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PHILOS 1500: Introduction to Logic, Week 2 Notes

by: Kaitlin Acton

PHILOS 1500: Introduction to Logic, Week 2 Notes PHILOS 1100

Marketplace > Ohio State University > PHIL-Philosophy > PHILOS 1100 > PHILOS 1500 Introduction to Logic Week 2 Notes
Kaitlin Acton
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About this Document

These notes focus on the difference between logical analysis and truth-value analysis as well as the difference deductive arguments and inductive arguments.
Introduction to Philosophy
Jerilyn Tinio
Class Notes
philosophy, Philosophy 1500, Introduction, logic, introduction to logic, Jerilyn Tinio, tinio
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This 2 page Class Notes was uploaded by Kaitlin Acton on Wednesday January 27, 2016. The Class Notes belongs to PHILOS 1100 at Ohio State University taught by Jerilyn Tinio in Fall 2015. Since its upload, it has received 92 views. For similar materials see Introduction to Philosophy in PHIL-Philosophy at Ohio State University.


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Date Created: 01/27/16
Philosophy 1500: Introduction to Logic Notes from Week Two (1/20, 1/22) Lectures  Once again, warnings are NOT arguments.  TRUTH AND LOGIC  There are some important terms that we need to know when we begin analyzing  arguments.   Truth­value analysis involves an assessment of the premises and whether or not they are true. This has nothing to do with the conclusion. This is simply looking at the premises  and deciding if they are true or false.  Logical analysis is the analysis of the support given by the premises to the conclusion.  When we conduct logical analysis, we do not care about whether or not the premises are  true. All we care about is whether or not the premises give support to the conclusion.   Both of these types of analysis are used to determine whether an argument is a “good  one” (more technical language will be introduced later). TWO TYPES OF ARGUMENTS  There are two types of arguments and we will be dissecting both types in this class.  Deductive arguments are arguments in which if both premises are true, then the  conclusion HAS TO BE true. In other words, the premises NECESSITATE the  conclusion.  o ONCE AGAIN: It does not matter if the premises are ACTUALLY true. If we  assume the premises are true and then, the premises make the conclusion  absolutely, without­a­doubt true, then we have a deductive argument.  o Deductive arguments are very matter­of­fact. They argue that something either is  or it is not. There is no in­between.  Inductive arguments are arguments in which if both premises are true, then the  conclusion is PROBABLY true.  o Inductive arguments deal with very statistical type thinking. As mentioned before, if we ASSUME that the premises are true and then, the conclusion is MOST  LIKELY true, then we have an inductive arguments. o Inductive arguments have a bit more room for disagreement than deductive  arguments. They have varying degrees of strength, a topic we will cover later. 


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