The question (15 marks)
State the rules of per genus et differentiam definition, name the fallacy attaching to each, and give the qualification which limits each rule. Illustrate throughout. (15 marks)
MU Module IV, head 4.2; pack ch. 13.
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 4 · Definition and Logical Division of Logic – I.
Authorities you will need
- Aristotle, who recognised only real definition and the essence
- Joseph, Introduction to Logic, whose first two rules are noted and set aside
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.