Level:
Lib
Thy
Top
:
Hypotheses:
None
Conclusion:
n:
.
l:
n List. en(l)
(n
||l||)
Applied Tactic:
UnivCD THENW Auto
Generated subgoals:
1
. en(l)
(n
||l||)
n:
. l:n List. en(l) 
(n
||l||) (n||l||)