The question (15 marks)
Why is the traditional classification of propositions said to be defective? Set out the modern classification, symbolise the four traditional forms, and explain the doctrine of existential import. (15 marks)
MU Module II, heads 2.5 to 2.9; pack ch. 08.
Plan your answer on paper before you look at the authorities — issue first, then the rule, then apply it to these facts.
It tests Unit 2 · Propositions of Logic – I.
Authorities you will need
- Aristotle, whose subject-predicate doctrine is the object of the criticism
- Keynes, Formal Logic, on the traditional schedule
- Cohen and Nagel, An Introduction to Logic and Scientific Method
How an answer is marked
A full-marks answer names the issue in one line, states the rule with its section, cites the authority, applies it to these facts and concludes — in that order. The app's model answer for this question is written in exactly that shape, with a checklist to mark your own attempt against.