Thank you response - it's quite helpful.

  Logical solvency is an interesting choice of words - solvency, a
  term from the world of finance to indicate just how much better
  the assets are than the liabilities - and the synonyms of the
  word are telling:
  [1]http://www.thesaurus.com/browse/solvency
  [I love a thesaurus for it gives the general concept of a word
  and takes it out of its home context into related - and
  sometimes unrelated areas, but in this case, the synonyms are
  very consistent to your apparent (to me) meaning].

  Synthetic agreement - by this in a "grounded in reality" sense
  or a "in the ways that are not analytical in nature" - which I
  suppose amounts to the same things... the gounded-in-reality
  argument sees analytical philosophy as 'head-in-the-clouds' and
  the "ways that aren't analytical", which has a slightly negative
  connotation from the analytical 2+2=4 is all that matters camp.

  So if I can attempt a poor rephrasing:

  a) It holds together in an analytical sense - if not perfectly,
  at least quite well - in a 2+2=4, all cats are mammals sense,
  although not necessarily wedded to a particular system of logic,
  so long as the logic being used is internally consistent.

  This would be akin to a working structure - the engineer's
  drawing, the model.

  b) It's realistic, to put it in a blunt term. The engineer's
  plans are agreeable to the stakeholders, the community, its
  aesthetic in senses other than its logical consistency.

  c) In general, there's gotta be an agent. There's change.
  There's a before causing an after.

  Let me know what I got wrong here.

References

  Visible links
  1. https://l.facebook.com/l.php?u=http%3A%2F%2Fwww.thesaurus.com%2Fbrowse%2Fsolvency&h=aAQHrlhCz