Related:

• o a zeroth approximation: [from `to a first approximation'] A *really* sloppy approximatio
  a wild guess. Compare {social science number}. -- The AI Hackers Dictionary...
• All exact science is dominated by the idea of approximation. -- Bertrand Russell (1872-1970)
• Everything you know is wrong. But some of it is a useful first approximation.
  -- Eric S. Raymond...
• Everything you know is wrong, but some of it is a useful approximation!
• Five is a sufficiently close approximation to infinity. -- Robert Firth