Walt Stoneburner wrote:
Does +(A1 A2 A3) +(B1 B2 B3) -(C1 C2 C3) find documents that have at least one A -and- at least one B, but never any Cs? ...to which I'm now given to understand the answer is yes. And understand why.
Well, that example would follow standard boolean logic if that's the case, since "NOT (C1 OR C2)" would be equal to "NOT(C1) AND NOT(C2)".
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