Exercise : Different types of necessity

Identify the kind of necessity that is meant in the following statements.

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Q1. It must be the case that if Peter is a man then Peter is a man.

Choose answer Logical necessity Causal necessity Legal necessity None of the above

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Q2. Mary has to visit Jack - he is her only family member.

Choose answer Logical necessity Causal necessity Legal necessity None of the above

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Q3. Heroin is necessarily addictive

Choose answer Logical necessity Causal necessity Legal necessity None of the above

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Q4. You must be over 18 before you can vote.

Choose answer Logical necessity Causal necessity Legal necessity None of the above

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Q5. Mary has eaten 600 oysters in the last hour. She must be feeling very sick now.

Choose answer Logical necessity Causal necessity Legal necessity None of the above

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Q6. One plus one has to be two

Choose answer Logical necessity Causal necessity Legal necessity None of the above

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Q7. You must not lie, must not steal, and must not kill, or else you will not go to heaven.

Choose answer Logical necessity Causal necessity Legal necessity None of the above

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Q8. Today must be Monday if yesterday was Sunday.

Choose answer Logical necessity Causal necessity Legal necessity None of the above

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Q9. A mixture of iodine and starch must turn blue.

Choose answer Logical necessity Causal necessity Legal necessity None of the above

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Q10. Necessarily, either she likes you or she does not like you.

Choose answer Logical necessity Causal necessity Legal necessity None of the above

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Q11. The next Chief Executive of the Hong Kong Special Administrative Region must be a permanent Hong Kong resident

Choose answer Logical necessity Causal necessity Legal necessity None of the above

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Q12. Anyone who has seen a black dog must have seen a dog.

Choose answer Logical necessity Causal necessity Legal necessity None of the above

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