Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta
    • Thread Starter

    I've been looking at a book and I just want to make sure I've got the basic theory of proof sussed:

    'If a movie is not worth seeing, then it was not made in England. A movie is worth seeing ONLY if critic Ivor Smallbrain reviews it. The move 'The Good, the Bad and the Mathmatician was not reviewed by Ivor Smallbrain. Therefore it was not made in England.'

    I'm going to underline letters to mean NOT them as I don't know how to write a bar.

    Assume W means worth seeing. E means made in england. I means it was reviewed by Ivor.

    My thought process was:

    W => E

    and W => I

    Therefore I => W

    and so I => E

    And so the movie was not made in England.

    Did I deduce implications from the text properly?

    All good and clearly stated

    (Just to say the ¬ symbol is good for meaning not...gets used in propositional logic and is on a keyboard! eg. ¬A means not A)

    can't see anything wrong with that
Have you ever experienced racism/sexism at uni?
Useful resources

Make your revision easier


Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here


How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.