tutorial_five - Necessity and Sufficiency A condition A is...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Necessity and Sufficiency A condition A is said to be necessary for a condition B , iff the falsity of A guarantees the falsity of B . This is the second part of a conditional! A condition A is said to be sufficient for a condition B , iff the truth of A guarantees the truth of B . This is the first part of a conditional! If you are faced with a question about necessity and sufficiency that you can’t figure out, put it into conditional form. If it’s a true conditional, you know that the first part is sufficient and the last part is necessary. You can then answer the question accordingly. JUST BECAUSE YOU GET ONE TRUE CONDITIONAL DOESN’T MEAN YOU SHOULDN’T TRY IT THE OTHER WAY AROUND!!! REMEMBER THAT SOMETHING CAN BE BOTH A NECESSARY AND SUFFICIENT CONDITION!!! (ASTERICED CONDITIONALS ARE THE FALSE ONES…SO, FOR INSTANCE IN THE FIRST ONE, RECEIVING CREDIT IS SUFFICIENT, BUT NOT NECESSARY FOR BEING ENROLLED IN THE COURSE BECAUSE IT IS IN THE SUFFICIENT CONDTITION’S POSITION IN THE TRUE CONDITIONAL).
Image of page 1

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

View Full Document Right Arrow Icon
Image of page 2
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