25-29 There are very few attempts to justify main points and there is little evidence of counterclaims.

30-34  There is some justification of main points.  Counterclaims are not directly identified but may be implied.

35-39  Most points are justified; most arguments are coherent.  Some counterclaims are considered.

40-44 All, or nearly all, main points are justified and arguments are coherent.  Counterclaims  are explored.  Implications of arguments are identified.

45-50 The response provides a high degree of insight.  All main points are justified andarguments are coherent and compelling.  Counterclaims are explored and evaluated.  Implications and underlying assumptions are identified.