statement is logically faulty ; substitute : z=zero result : one minus zero is zero !!! facit : give me a buck (=1) for each such transaction !

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## 1 - Z = Z ; implying: (z+z=1) derives from nonsense

statement is logically faulty ;

substitute : z=zero

result : one minus zero is zero !!!

facit : give me a buck (=1) for each such transaction !