Related:

• Testing can show the presence of bugs, but not their absence.
  -- "Programming Pearls", Communications of the ACM, Sep. 1985...
• ACCEPTANCE TESTING: An unsuccessful attempt to find bugs.
• We're testing as QWK as we can.
• FORTRAN, the infantile disorder, by now nearly 20 years old, is hopelessly inadequate for whatever computer application you have in mind today
  it is now too clumsy, too risky, and to expensive to use....
• At least a toad can eat what bugs him.
• No bugs? Don't worry... I can fix that...
• Optimization is not free. Gratuitous optimization can be translated directly >into missing features or later release dates.
  -- Peter da Silva, peter@ficc.ferranti.com ...and more bugs....
• while we all know that unmastered complexity is at the root of the misery
  we do not know what degree of simplicity can be obtained, nor to what extent the intrinsic complexity of the whole design has to show up in the interfaces....