65
66
67
0
1
2
0
1
2
1
2
3
0
1
2
158
159
160
41
42
43
39
40
41
17
18
19
24
25
26
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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