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Logic 101 Practice Test: Formal Logic - Propositional Logic
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Propositional logic is a branch of logic that studies how to combine or modify statements to create more complex statements. It also studies the logical relationships and properties that come from these methods.  Propositional logic is also known as statement logic, sentential calculus, or sentential logic. It is different from other branches of logic because it doesn't deal with logical relationships and properties that involve parts of a statement smaller than the simple statements that make it up.  Propositional logic is concerned with statements that can be assigned the truth values... Show more
Logic 101 Practice Test: Formal Logic - Propositional Logic
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18 Questions

1. If a group of statements are consistent, this means:
2. If the nuts are stale, then they should not be put into the salad. Thus, the nuts are stale, since they should not be put into the salad.
3. Escaping between the horns of a dilemma means:
4. If our company reduces wages, then it will lose its labor force; but if it does not reduce wages, then it will go bankrupt. Thus, our company will either lose its labor force or go bankrupt, since it will either reduce wages or not reduce them.
5. If dinosaur DNA has deteriorated, then it is impossible to recreate dinosaurs. If dinosaurs perished long ago, then dinosaur DNA has deteriorated. Hence, if dinosaurs perished long ago, then it is impossible to recreate them.
6. Suppose an indirect truth table is constructed for an argument, and the truth table requires more than one line. If no contradiction is obtained on the first line, then:
7. Escaping between the horns of a dilemma means:
8. In the expression 'P • Q', 'P' is called:
9. French has many irregular verbs. But if that is so, then French is harder to learn than English. Thus, French is harder to learn than English.
10. When the disjunctive premise of a dilemma is of the form p ∨ ∼p, then it is impossible to:
11. If rainfall is normal, then grain reserves will not be tapped, because if the harvest is not abundant, then grain reserves will be tapped, and if rainfall is normal, then the harvest will be abundant.
12. Suppose an indirect truth table is constructed for a series of statements, and the truth table requires more than one line. If a contradiction is reached on the first line, then:
13. If rainfall is normal, then grain reserves will not be tapped, because if the harvest is not abundant, then grain reserves will be tapped, and if rainfall is normal, then the harvest will be abundant.
14. If eggs do not contain cholesterol, then they are healthy to eat. But eggs do contain cholesterol. Thus, eggs are not healthy to eat.
15. Either tobacco advertising will not be curtailed or teenage smoking will increase. Therefore, teenage smoking will increase, since tobacco advertising will be curtailed.
16. If eggs do not contain cholesterol, then they are healthy to eat. But eggs do contain cholesterol. Thus, eggs are not healthy to eat.
17. If an indirect truth table requiring more than one line is constructed for either an argument or a series of statements and no contradiction is derived on the first line, then:
18. If our company reduces wages, then it will lose its labor force; but if it does not reduce wages, then it will go bankrupt. Thus, our company will either lose its labor force or go bankrupt, since it will either reduce wages or not reduce them.

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