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Proof step 1 from proof ri-cons-copy (conclusion)
⊦ ri-cons(ri, fs) ∧ # ax1 = # ndx ∧ new(ax1, fs) → ri-cons(ri, fs[ax1, ndx])
System applied rule normalize
And obtained the following new goals
Proof step 2
:
# ax1 = # ndx, new(ax1, fs), ri-cons(ri, fs) ⊦ ri-cons(ri, fs[ax1, ndx])
Rule argument
Additional information