The fact that some prescriptive rules are valuable does not mean that every grammatical injunction should be obeyed.
Simmons knows she faces an uphill battle—but her goal this time around is to be prescriptive about the problem.
It was descriptive, prescriptive, and exemplary in its clarity.
1748, from Late Latin praescriptivus, from praescript-, past participle stem of praescribere (see prescription). Or formed in English from archaic prescript "a direction" (1530s), from Latin praescriptum.