sentences:  Every skew lattice formula_17 has a unique maximal right-handed image formula_71 where the congruence formula_53 is defined by formula_73 if both formula_74 and formula_75 (or dually, formula_76 and formula_77).Likewise a skew lattice is left-handed if formula_74 and formula_76 in each formula_29-class.Again the maximal left-handed image of a skew lattice formula_17 is the image formula_82 where the congruence formula_54 is defined in dual fashion to formula_53.