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At: sublist weakening wrt identity 1 1 1 1 1 1

1. T: Type
2. Discrete{T}
3. eq: {T}
4. eq TT
5. x:T. eq(x,x)
6. x,y:T. eq(x,y) eq(y,x)
7. x,y,z:T. eq(x,y) eq(y,z) eq(x,z)
8. L: T List
9. M: T List
10. L = M
11. u: T
12. v: T List

if eq(u,u) true else u(eq) v fi

By:
Witness5 u
THEN
FwdThru Thm* P:. P P = true [-1]


Generated subgoal:

15. x,y:T. eq(x,y) eq(y,x)
6. x,y,z:T. eq(x,y) eq(y,z) eq(x,z)
7. L: T List
8. M: T List
9. L = M
10. u: T
11. v: T List
12. eq(u,u)
13. eq(u,u) = true
if eq(u,u) true else u(eq) v fi

About:
listboolbtrueifthenelseassertapply
functionuniverseequalmemberimpliesall

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