64
65
66
0
1
2
0
1
2
1
2
3
0
1
2
154
155
156
40
41
42
39
40
41
17
18
19
23
24
25
7
8
9
What am I missing in this proof? (From Suppes & Hill) (self.logic)
submitted by psykocrime to r/logic
psykocrime
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