I understand the majority of the missing premise questions but for questions 1-7 my answer is the contrapositive. There is also no explanation so I do not understand why I have this wrong.
Question 1:
P: X ? B
P: ?
P: not A ? not B
C: not D ? A
Question 2:
P: not X ? not Y
P: ?
C: not X ? not B
Question 3:
P: X ? A
P: ?
C: not A ? B
Question 4:
P: C ? E
P: E ? Z
P: ?
C: not D ? not C
Question 5:
P: D ? A
P: C ? D
P: ?
C: not X ? A
Question 6:
P: ?
P: not B ? A
C: X ? B
Question 7:
P: A ? B
P: ?
P: not X ? not D
C: not X ? not A
I do not understand this question at all. Please explain.
Question 8:
P: X ? Z
P: Z does not exist
P: ?
C: A exists
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