Briefly, the notion of other-centric UI is absurd. UI are used to express emotions, to grant certification, to make promises and so on. Thus they can only be used by the persons performing these acts. The most another person can do is either report that utterance of the word in question or (more daringly) claim that the first person has the emotion or whatever or has performed the act in question. Both of these are straightforward factual claims and, to the extent that Lojban is based on logic, need to be expressed in normal assertive ways: free standing sentences or non-restrictive relative clauses in such sentences. 'da'oi ui lindbar' fails this test unless it is an approved abbreviations for "Lindbar said "ui" about this subject" or "Lindbar
is happy about this subject." At the moment, this does not seem to be the case, and, even if it is, it is very badly chose, since it does not *look* to be an assertion.