Chapter 6

Question 1

Validity

Answer 1

The impossibility of a false conclusion follow from true premises.

Question 2

Invalidity

Answer 2

The possibility of a false conclusion following from true premises.

Question 3

Conjuction

Answer 3

. and

Question 4

Disjunction

Answer 4

v Or

Question 5

Implication

Answer 5

> If, then

Question 6

Equivalence

Answer 6

= if and only if

Question 7

Tautologous

Answer 7

Every line is true

Question 8

Self-contradictory

Answer 8

All lines are false

Question 9

Contingent

Answer 9

At least 1 false and 1 true

Question 10

Contradictory

Answer 10

Opposite truth values

Question 11

Logically Equivalent

Answer 11

Both lines match

Question 12

Consistent

Answer 12

Atleast one where both true

Question 13

Inconsistent

Answer 13

If no line has both true

Question 14

Disjunctive Syllogism

Answer 14

pvq/~p//q

Question 15

Pure Hypothetical Syllogism

Answer 15

p>q/q>r//p>r

Question 16

Modus Ponens

Answer 16

p>q/p//q

Question 17

Modus Tollens

Answer 17

p>q/~q//~p

Question 18

Constructive Dilemma

Answer 18

(p>q).(r>s)/pvr//qvs

Question 19

Destructive Dilemma

Answer 19

(p>q).(r>s)/~qv~s//~pv~r

Question 20

Every line is true

Answer 20

Tautologous

Question 21

All lines are false

Answer 21

Self-contradictory

Question 22

At least 1 false and 1 true

Answer 22

Contingent

Question 23

Opposite truth values

Answer 23

Contradictory

Question 24

Both lines match

Answer 24

Logically Equivalent

Question 25

Atleast one where both true

Answer 25

Consistent

Question 26

If no line has both true

Answer 26

Inconsistent