Unit 12 · Multi-Step Conditional Reasoning
Kinta's Driving Test — Necessary Condition Deduction
Lesson 3 of 16
About this lesson
"Must have 20 hours to have a chance" means 20 hours is NECESSARY. The contrapositive is: less than 20 hours → zero chance (cannot pass). Option B states exactly this. Option A wrongly treats 20 hours as SUFFICIENT (a guarantee), which the rule never says.
Chapters
Question
When Kinta was learning to drive his instructor told him: "To have even a chance of passing your driving test you must have had at least 20 hours of driving practice."
If Kinta’s instructor is correct, which one of these will be true?
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