LOGIC PROOF
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TRUE
D
((A
→
B)
→
C)
→
D
0
Truth check table
Case
D
A
B
C
((A
→
B)
→
C)
→
D
1
T
T
T
T
T
2
T
T
T
F
T
3
T
T
F
T
T
4
T
T
F
F
T
5
T
F
T
T
T
6
T
F
T
F
T
7
T
F
F
T
T
8
T
F
F
F
T
9
F
T
T
T
F
10
F
T
T
F
T
11
F
T
F
T
F
12
F
T
F
F
F
13
F
F
T
T
F
14
F
F
T
F
T
15
F
F
F
T
F
16
F
F
F
F
T
Public:
Yes
;
Show truth table:
Yes
;