translate 
assignment into truth values
x1 x2 !x3 x4 !x5 !x6 -> true true false true false false

/home/lieber/.www/courses/csu670/sp09/DemeterF/examples/sign-clean

Review of concepts of SDG game

T Ball:
derivative d
break-even[d]
look-ahead[d](b)
look-ahead[r](b)

maximize look-ahead polynomial
maximum bias: b_max

break-even[d] = look-ahead[d] (b_max)

break-even[d] if raw materials may be arbitrary large


Code review

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