Unit 1

Question 1

Proposition

Answer 1

A sentence that can be true or false. That is, every sentence that we call a proposition has a truth value.

Question 2

Argument

Answer 2

A set of propositions, one of which (the conclusion) is claimed to follow from the others (which are called PREMISES)

Question 3

Deductive Argument

Answer 3

An argument for which we are prepared to make the claim that if the premises are true, the conclusion must be true.

Question 4

Inductive Argument

Answer 4

An argument for which we are prepared to make the claim that the premises are evidence for the conclusion, though they do not guarantee it.

Question 5

A Valid Deductive Argument

Answer 5

A deductive argument such that if the premises are true the conclusion MUST be true.

Question 6

Invalid Deductive Argument

Answer 6

A deductive argument that is not valid; that is, it is a deductive argument such that it is possible that the premises could be true while the conclusion is false.

Question 7

A sound (deductive) argument

Answer 7

A valid argument with every premise true.