Quiz 4.4 Critical Thinking By Example


1. There will be trouble. If I stay, there will be trouble. If I go, it will be double.

a) This argument is valid.
b) This argument is invalid.
2. Most days are miserable, since my boss makes weekdays a living hell.

a) This argument is valid
b) This argument is invalid.
3. It don't mean a thing, if ain't got that swing. But it does mean a thing, since it has that swing.

a) This argument is valid
b) This argument is invalid.
4. It don't mean a thing, if ain't got that swing. It don't mean a thing, so it ain't got that swing.


a) This argument is valid.
b) This argument is invalid.
5. It don't mean a thing, if ain't got that swing. Since, it ain't got that swing, it don't mean a thing.


a) This argument is valid.
b) This argument is invalid.
6. The sun has risen everyday. Of course, somedays we can't see it, for example, when there is lots of cloud cover. The sun will rise tomorrow.

a) This argument is invalid.
b) This argument is valid.
7. Unless my colleagues stop spying on me, I will never stop being paranoid. But knowing my colleagues, this will never happened. I guess I am destined to be paranoid forever.

a) This argument is valid
b) This argument is invalid.
8. If there is ever going to be good government, then the philosophers must become kings, because if philosophers are not kings, then there won't be good government.

a) This argument is valid
b) This argument is invalid.
9. The label says "500 hundred multivitamins". We have sampled 499 and they were all multivitamins. The last one must be a multivitamin.

a) This argument is valid.
b) This argument is invalid.
10. The label says "500 hundred multivitamins". Labels never lie. We have sampled 499 and they were all multivitamins. The last one must be a multivitamin.

a) This argument is valid.
b) This argument is invalid
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