Two Solutions
AB
01
1
1
1
1
00
CD
00
0
1
0
0
01
11
10
0
0
0
0
1
1
0
0
11
10
EACH solution is equally valid.
F(A,B,C,D) = A’C’ + ACD + A’BD
AB
01
1
1
1
1
00
CD
00
0
1
0
0
01
11
10
0
0
0
0
1
1
0
0
11
10
F(A,B,C,D) = A’C’ + ACD + BCD
Essential PIs
Non-Essential PIs
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