Harvey Siegel argues that minimum competency testing (MCT) is incompatible with strong sense critical thinking. His arguments are reviewed and contrasted with positions held by John E. McPeck and Michael Scriven. Siegel's arguments seem directed against the prevailing form of MCT. However, alternative formats which allow for the aggregate and context-sensitive nature of critical thinking are not doomed to the arbitrariness Siegel finds. MCT may be a legitimate and useful means for furthering critical thinking as one of our educational ideals.