#CH15 MORE CONNECTIVES

Question 1

WHAT ~ MEANS?

Answer 1

CONNECTIVE ~ NOT

Question 2

CHARACTERISTICS OF ~?

Answer 2

+~ NOT CONNECT PROPO, AS & + V. ~ +PREFIXED FORMULA SINGLE PROPO,
->NEGATION.
+~ ‘NEGATION OPERATOR’,> ‘NEGATION
CONNECTIVE’.
+GROUP NEGA OPER with OTHER
CONNECTIVES,

Question 3

EX of ~?

Answer 3

B SLEEP = BILL SLEPT,
->~ B SLEEP = BILL DIDN’T SLEEP

Question 4

CONJUNC 2 NEGA ?

Answer 4

CONJUNC 2 NEGA
NEITHER … NOR = NEGATION EITHER … OR

Question 5

(~ A COME) & (~ B COME)=?

Answer 5

(~ A COME) & (~ B COME) = ~ (A COME V B COME)

Question 6

(~ A COME) V (~ B COME)=?

Answer 6

(~ A COME) V (~ B COME) = ~ (A COME & B COME)

Question 7

~ (P V Q)=?

Answer 7

~ (P V Q) = (~ P) & (~ Q)

Question 8

~ (P & Q)=?

Answer 8

~ (P & Q) = (~ P) V (~ Q)

Question 9

P/ ~~P?

Answer 9

P/ ~~P
(PREMISS) /(CONCLUSION)
EX:HENRY DIED=IT IS NOT THE CASE THAT HENRY DIDN’T DIE?

Question 10

IF ALAN is HERE, CLIVE is a LIAR FORMULA ?

Answer 10

IF ALAN is HERE, CLIVE is a LIAR FORMULA
=A HERE ->C LIAR.

Question 11

SYMBOL CONDITION?

Answer 11

A->B

Question 12

D BROTHER A -> (F AUNT D V B UNCLE D)=?

Answer 12

D BROTHER A -> (F AUNT D V B UNCLE D)?
=IF DAVID IS ALICE’S BROTHER, THEN EITHER FANNY’S HIS AUNT OR BOB’S HIS
UNCLE
=(D BROTHER A → F AUNT D) V B UNCLE D?
=EITHER BOB IS DAVID’S UNCLE OR, IF DAVID IS ALICE’S BROTHER, FANNY IS
HIS AUNT

Question 13

TRÙNG?

Answer 13

trùng. = IF AND ONLY IF = ‘BICONDITIONAL’.
EX ADA is married to BEN IF AND ONLY IF BEN is married to ADA

Question 14

(A marry B) TRÙNG?

Answer 14

(A marry B) TRÙNG (B marry A)

Question 15

P TRÙNG Q=?

Answer 15

P TRÙNG Q = (P -> Q) & (Q -> P)

Question 16

~(P V Q) TRÙNG?

Answer 16

~(P V Q) trùng ~P & ~Q

Question 17

~(P & Q) TRÙNG?

Answer 17

~(P & Q) trùng ~P V ~Q

Question 18

P TRÙNG?

Answer 18

P trùng ~~P