Subjective Bayesianism and Humean decision theory are dominant as both prescriptive and descriptive accounts of reasoning and rational decision-making. A subsequent genre of work within these paradigms acknowledges that the basic theories suffer from certain limitations or unexplained paradoxes, then seeks to modify them so as to remedy the defect. I develop arguments both against the original, "pure" paradigms and against certain attempts to correct them, making a case for a pluralist account of knowledge and decision-making.