(logic circuits) A Boolean operation that's correct when the two enter variables are unique but is in any other case Phony; the XOR operation ( A B ¯ + A ¯ B displaystyle scriptstyle A overline B + overline A B (= quarrel) ? Differenz f, ? Auseinandersetzung file; a difference of viewpoint ? eine Meinungsverschiedenheit; to settle or resolve a si