The question (10 marks)
Explain the four immediate inferences other than the eductions, and discuss why their validity cannot be judged from the form of the inference. Is inference by converse relation an exception? (10 marks)
MU Module III, head 3.4; pack ch. 11.
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 3 · Inference of Logic – I.
Authorities you will need
- Bain, who mentions material obversion
- Keynes, Formal Logic, on the remaining immediate inferences
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.