L21Deduction.6slides - Lecture Outline Issues(a What are...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Deductive Reasoning Lecture Outline Issues: (a) What are the phenomena of deduction? (b) How do people reason deductively? 1. Introduction to deduction What it is, types of deductive problems 2. Phenomena of deductive reasoning Syllogistic reasoning: difficulty, validity, content, atmosphere, figural, conversion Wason selection task: difficulty, content 3. Theories of deductive reasoning Formal rules Mental models Verbal reasoning Deductive Reasoning: Examples Quantifier (Categorical Syllogisms) Some businessmen are wealthy All wealthy people are powerful Therefore some businessmen are powerful Comparative (Linear Syllogisms) Mighty Joe Young is more powerful than Godzilla King Kong is more powerful than Mighty Joe Young Therefore, King Kong is more powerful than Godzilla Conditional If you write a good research proposal, then you will get funded. You write a good research proposal You will be funded Quantifiers: Syllogisms All men are animals. Some animals are aggressive Therefore, some men are aggressive All men are animals Some animals are female Therefore, some men are female All A are B Some B are C Therefore, some A are C Quantifier types All doctors are rich. Some lawyers are dishonest. No politician is trustworthy. Some actors are not handsome. Difficulty Effect Syllogisms are hard Subjects typically get ~50% wrong Some B are A No C are B What, if anything, necessarily follows?
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Validity effect Some A ʼ s are B ʼ s All B ʼ s are C ʼ
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern