[G.Polya]
Inventor's paradox The more ambitious plan may
have more chances of success.
    This sounds paradoxical.  Yet, when passing from one
problem to another, we may often observe that the new, 
more ambitious problem is easier to handle than the
original problem. More questions may be easier to an
answer than just one question. The more comprehensive
theorem may be easier to prove the more general problem
may be easier to solve.
     The paradox disappears if we look loser at a few 
examples ( GENERALISATION, 2.INDUCTION AND MATHEMATICAL INDUCTION,7).
The more ambitious plan may have more chances of success 
provided it is not based on mere pretencion but on some 
vision of the things beyond those immediately present.