S2 L4 Valid and sound

Is the following argument valid?

All humans are mortal.

Plato was a human.

Therefore, Plato was mortal.

• Yes

• No

Is the following argument valid?

All singers are robots.

Taylor Swift is a singer.

Therefore, Taylor Swift is a robot.

• Yes

• No

Is the following argument valid?

All cartoon characters have a funny voice.

Mickey Mouse has a funny voice.

Therefore, Mickey Mouse is a cartoon character.

• Yes

• No

Is the following argument sound?

All animals live on Mars.

All humans are animals.

Therefore, all humans live on Mars

• Yes

• No

Is the following argument valid?

All animals live on Mars.

All humans are animals.

Therefore, all humans live on Mars

• Yes

• No

A statement...

• is a sentence with a truth value.

• is always a premise in an argument.

• has at least six words

• can be called 'valid' in philosophy.

A premise must... (click all that apply)

• always be true.

• be a statement.

• have a truth value.

• give evidence for the conclusion.

In philosophy, a conclusion is...

• what an argument is trying to show the truth of.

• the last part of an argument.

• the end of a discussion.

• a claim that is always explicit.

P1 All cats are felines

P2 Lions are felines

C So Lions are cats

Tick what applies to this above argument

• valid

• invalid

• sound

• unsound

P1 All vertebrates have a back bone

P2 Birds are vertebrates

C Birds have a back bone

Tick what applies to this above argument

• valid

• invalid

• sound

• unsound