Clarification on {be} vs. {pe}

[Nick NICHOLAS <nicholas@uci.edu>]

In lesson 9
(http://www.opoudjis.net/lojbanbrochure/lessons/less9sumtcita.html), I
claim that it is more usual for internal sumti with sumti tcita to be
added with {pe} than {be}. Robin.CA queries this. My impression may have
been mistaken; the examples I remember are reproduced in The Book, but
John has carefully restricted his exx. to cmene, which of course can't
take {be}.

Are the claims made in that part of the lesson misleading? Opinions
solicited.

-- 
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Nick Nicholas, Breathing {le'o ko na rivbi fi'inai palci je tolvri danlu}
nicholas@uci.edu -- Miguel Cervantes tr. Jorge LLambias