mb event system 3 Sections EventSystems Doc
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Def Msg == Msg(1of(2of(2of(2of(2of(es))))))

is mentioned by

Thm* the_es:ES, m:Msg. mlnk(m)  IdLnk[mlnk_wf2]
Thm* the_es:ES, m:Msg. mtag(m)  Id[es-mtag_wf]

In prior sections: mb event system 2

Try larger context: EventSystems IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html

mb event system 3 Sections EventSystems Doc