#f #t #u #p #Hu #ql * *
[ #rl * #r #Hr #H1 #H2 destruct
>unwind2_path_append_proper_dx
/4 width=5 by in_comp_unwind2_path_term, in_comp_tpc_trans, or_introl, ex2_intro/
| * #q #Hq #H1 #H0
@(ex2_intro ā¦ H1) @or_intror @conj // *
#f #t #u #p #Hu #ql * *
[ #rl * #r #Hr #H1 #H2 destruct
>unwind2_path_append_proper_dx
/4 width=5 by in_comp_unwind2_path_term, in_comp_tpc_trans, or_introl, ex2_intro/
| * #q #Hq #H1 #H0
@(ex2_intro ā¦ H1) @or_intror @conj // *