 As models, (P1) and (P4) have different strengths and weaknesses, and while discussing them Stevenson suggests or implies several other models: (P2a)-(P3c). Like (P1), (P2a)-(P2c) exemplify Stevenson’s First Pattern of Analysis, and, like (P4), (P3a)-(P3c) exemplify Stevenson’s Second Pattern of Analysis. Notice that each subset of models, and each model within each subset, is listed roughly in order of increasing descriptive richness and decreasing emotive force.