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At: auto2 lemma 4 1 1 1 1 2
1. Alph: Type
2. R: Alph*Alph*Prop
3. n:
4. (x:Alph*. R(x,x)) & (x,y:Alph*. R(x,y) R(y,x)) & (x,y,z:Alph*. R(x,y) & R(y,z) R(x,z)) & (x,y,z:Alph*. R(x,y) R((z @ x),z @ y)) & (w:(nAlph*). l:Alph*. i:n. R(l,w(i)))
5. a: Alph*
6. b: Alph*
7. c: Alph*
8. l:Alph*. (a.a':Alph*. ||a'|| < nn & R((a @ b),a' @ b) & R((a @ c),a' @ c))(l)

a':Alph*. ||a'|| < nn & R((a @ b),a' @ b) & R((a @ c),a' @ c)
By: Witness8 a
Generated subgoal:

18. (a.a':Alph*. ||a'|| < nn & R((a @ b),a' @ b) & R((a @ c),a' @ c))(a)
a':Alph*. ||a'|| < nn & R((a @ b),a' @ b) & R((a @ c),a' @ c)

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