It may be that V can be considered to enclose a question. As is What is the solution to X = blah or What is the height of a Tau Cetian? Then W can be an answer or conclusion or even just a statement, like The solution is ... Perhaps a broader interpretation like this might help in the mysterious use of W at the end of message 3, and also in the lack of V in the still untranslated (or rather, not understood) section of message 3 (X=,p=11.5...)