L 12 - 13

Question 1

when is a sentence ambiguous ?

Answer 1

when grammar allows it to express more than one proposition ?

Question 2

can proposition be ambiguous?

Answer 2

no

Question 3

2 major kings of ambiguity

Answer 3

• lexical (semantic)

- structural (syntactic)

Question 4

when is a sentence lexically ambiguous?

Answer 4

when a specific word has more than one meaning

Question 5

when is a sentence structurally ambiguous?

Answer 5

grammar allows it to be read in different ways even if there is no individual word that is ambiguous

Question 6

what needs a lexical ambiguity to be like in an argument

to make it valid?

Answer 6

mean the same thing throughout the argument

Question 7

is or ambiguous?

Answer 7

yes

Question 8

how can be or interpreted?

Answer 8

inclusive disjunction or exclusive disjunction

Question 9

what to do with a structurally ambiguous argument?

Answer 9

reconstruct 2 differs arguments and evaluate

Question 10

when is a word vague ?

Answer 10

a word having one meaning that is imprecise

Question 11

what proofs can contradiction offer?

Answer 11

indirect proofs

Question 12

2 types of indirect proofs

Answer 12

proof from absurdity

proof by contradiction