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At: decidable list exists 1 2 1 1 1 1
1. T: Type
2. P: TProp
3. L: T List
4. u: T
5. v: T List
6. Dec(xv.P(x))
7. P(u)

P(u) xv.P(x) (P(u) xv.P(x))
By:
DNth 1 0
THEN
DNth 1 0
Generated subgoals:

None

About:
listdecidablefunctionuniversepropor

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