Because act-consequentialists typically agree with a rule-consequentialist decision procedure, whether to classify some philosopher as an act-consequentialist or as a rule-consequentialist can be problematic.  For example, G.E. Moore (1903, 1912) is sometimes classified as an act-consequentialist and sometimes as a rule-consequentialist. Like so many others, including his teacher Henry Sidgwick, Moore combined an act-consequentialist criterion of moral wrongness with a rule-consequentialist procedure for deciding what to do. Moore simply went further than most in stressing the danger of departing from the rule-consequentialist decision procedure (see Shaw 2000).