As professional practitioners, we take pride in our skills in judgement and reasoning. In applying ourselves to the puzzles we encounter in our work, we promote ourselves as offering perspectives and solutions that are substantively different from those that our clients can arrive at unaided. Arguably, this is what justifies our claims to a professional status. But how exactly do we make these judgements? Presumably, what separates us from the public we seek to serve is our familiarity with the knowledge base of psychology and our ability to apply it in systematic ways. This implies an approach to decision-making that is rational and logical.