Pojman distinguishes between act and rule utilitarianism and suggests that the latter may be a more credible version of the theory, as it conforms to our rule-following nature and tends to provide more specific guidance than act utilitarianism. Utilitarianism in general has two main strengths: (1) it provides us with a single principle—Do what will promote the most utility—potentially applicable to every situation; and (2) it gets at the substance of morality rather merely providing us with an overly formal rule like the categorical imperative. However, opponents have also raised a number of powerful objections to utilitarianism. Pojman presents five (the no-rest objection, the absurd implications objection, the integrity objection, the justice objection, and the publicity objection) and discusses possible utilitarian responses to each.