At: member rel primed vars 2 1 1
1. x: Label
2. name: relname()
3. r1: Term List
4. u: Term
5. v: Term List
6. (x
reduce(
t,vs. term_primed_vars(t) @ vs;nil;v)) 
(
i:
. i < ||v|| & (x
term_primed_vars(v[i])))
7. (x
term_primed_vars(u))
8. 0 < ||v||+1
(x
term_primed_vars([u / v][0]))
By: Reduce 0
Generated subgoals:None
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