What kind of WFF is this? (Pv~Q) ~Q) = P V T FT TT TT TE TT F F FT T F FT TE F F a. contingent statement b. self-contradiction C. tautology d. consistent

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Problem 1RQ
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Both questions please 

QUESTION 28
What kind of WFF is this?
(P v~Q) = P
TT FI II
TT TF TT
V
FF FT IF
FT TE F F
a.
contingent statement
b. self-contradiction
O C.
tautology
Od. consistent
Transcribed Image Text:QUESTION 28 What kind of WFF is this? (P v~Q) = P TT FI II TT TF TT V FF FT IF FT TE F F a. contingent statement b. self-contradiction O C. tautology Od. consistent
QUESTION 30
(Y•X)
~Y•~X
FTTT
FT FFT
T TFF
T FFT
FT FTF
TF FFT
TF TTF
T FFF
What is the logical relationship between these WFFS?
a. consistent and logically equivalent
Ob. consistent but not logically equivalent
OC. inconsistent and contradictory
Od. inconsistent but not contradictory
Transcribed Image Text:QUESTION 30 (Y•X) ~Y•~X FTTT FT FFT T TFF T FFT FT FTF TF FFT TF TTF T FFF What is the logical relationship between these WFFS? a. consistent and logically equivalent Ob. consistent but not logically equivalent OC. inconsistent and contradictory Od. inconsistent but not contradictory
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