Semantic Relations

Question 1

True or false: Understanding the meaning of a sentence is equivalent to knowing its truth conditions

Answer 1

True

Question 2

What is entailment?

Answer 2

A sentence p entails a sentence q if when p is true q is also true

Question 3

What is equivalence?

Answer 3

p is equivalent to q if p entails q and q entails p

Question 4

What is contradiction?

Answer 4

p contradicts q if when p is true q is false and when q is true p is false

Question 5

What is contrariety?

Answer 5

p is contrary to q if when p is true q is false, but both can be false and both cannot be true

Question 6

A is a subset of B. Which logical relation is this?

Answer 6

Subordination

Question 7

A and B are the same set. Which logical relation is this?

Answer 7

Equivalence

Question 8

A and B are non-overlapping and exhaustive subsets. Which logical relation is this?

Answer 8

Complementary

Question 9

A and B are non-overlapping but not exhaustive subsets. Which logical relation is this?

Answer 9

Incompatibility