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At: not list all not iff list exists 1 1 2 1 1 1
1. T: Type
2. P: TProp
3. L: T List
4. u: T
5. v: T List
6. xv.(P(x)) xv.P(x)
7. (P(u) & xv.(P(x)))
8. (P(u) & xv.(P(x))) P(u) xv.(P(x))
9. Dec(P(u))

P(u) xv.P(x)
By:
Unfold `decidable` -1
THEN
Analyze -1
Generated subgoals:

19. P(u)
P(u) xv.P(x)
29. P(u)
P(u) xv.P(x)

About:
listdecidablefunctionuniversepropimpliesandor

(23steps) PrintForm Definitions Lemmas list 3 jlc Sections Support(jlc) Doc