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HighCohesion is a GRASP*-pattern** which says that a method should do a precise single task. This is to maximise readability, extensibility and reusability. One rule is that if you can’t easily name a method, it’s not cohesive and should be rewritten.

See: http://www.ugolandini.net/AccoppiamentoCoesioneE.html, http://c2.com/cgi/wiki?CouplingAndCohesion

** I don’t know how to mention this without the redundant acronym

– TheoHultberg/Iconara