Durang works at the level of acid cartoon, although he might not describe his method in those terms. "My sense of comedy comes from seeing a lot of things, things that are not just bad but very bad that, if presented boldfacedly on a stage, turn out to be funny."… [In Sister Mary Ignatius Explains It All For You, the] vividness of Sister Mary Ignatius as a likably malevolent lunatic depends as much on performance as it does on Durang's writing. In the opening part of the play, Sister Mary Ignatius answers questions, presumably submitted by the audience, in an often very funny session which makes the point that her assurance is a kind of ignorance by imprimatur. When her accusers turn up to illustrate the crippling results of her teaching (and when the play looks like it is in danger of succumbing to message), Durang has Sister...