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Syllogisms Part 2
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Dodos aren’t always weak, but they are always zipzaps. Not all those that are zipzaps are weak, but they will be boings.
Explanation
- All those that are zipzaps are dodos
No. We are told that all dodos are zipzaps but we don’t know if the reverse is true.
- A weak dodo is a zipzap
Yes. We are told in the first sentence that all dodos are zipzaps, so a weak dodo is therefore also a zipzap.
- A weak animal cannot be a boing
No. We are not given any information in the question stem about animals so we cannot draw this conclusion from the passage.
- Some boings are dodos
Yes. We know that all dodos are zipzaps and that all zipzaps are boings, so dodos must be boings as well. Hence some boings will be dodos.
- More zipzaps are weak than boings
No. The last sentence tells us that more zipzaps are boings than are weak, because all zipzaps are boings but only some zipzaps are weak.
Shorthand method:
Not all D = W
All D = Z
Not all Z = W
All Z = B