{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lecture_6_09 - Lecture 6 Lecture 6 Finding a target Finding...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Lecture 6 Lecture 6 Finding a target Finding a target Suppose that I ask you to simplify the following expression by using the algebraic system that we have been discussing: [¬(¬A ∧¬B) ∨¬B] ∧ A Will you begin by identifying a target or will you just start applying the rules without a direction in mind? Vampires and Zombies Vampires and Zombies You are on an island where there are two types of inhabitants: zombies (always tell the truth) and vampires (always lie). You meet Albert and Betty on the island. Albert says : At least one of us is a vampire. What do you know about these two? More Vampires and Zombies More Vampires and Zombies You meet Albert, Betty and Carl on the island. Albert says: None of us is a zombie. Betty say: I am the only vampire. What do you know about these three? SL in Natural Language SL in Natural Language Truth­value test: A sentence can be construed as a truth­functional compound, formed by applying sentential connectives, only if its truth­value is always determined according to the truth­table of that connective. (p.83) Applying the Truth­Value Test Applying the Truth­Value Test “John was unharmed by the accident.” (p.83) “John is unhappy today.” (p.84) HW 3.3 HW 3.3 A: Ann is married B: Barbara is married C: Clair is married D: Dorothy is married At least one of the four women is married. If one of the four women is married, all of them are. Ann and Clair have the same marital status. HW 3.5 HW 3.5 No one can be good for long if goodness is not in demand. If there are obstacles, then the shortest line between two points may be a crooked line. Literary works cannot be taken over like factories, or literary forms of expression like industrial methods. The Island of Questioners The Island of Questioners There are two types of inhabitants, A and B. Type A ask only yes/no questions whose correct answer is yes. Type B ask only yes/no questions whose correct answer is no. A person on the island asks you “Am I of type B?” What can you conclude? If you like the kind of puzzles that If you like the kind of puzzles that we discussed today, then … Have a look at the following books by the great Ray Smullyan: What is the name of this book? The Lady or the Tiger? and Other Logic Puzzles ...
View Full 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