Jennifer Welchman

William James's 'The Will to Believe" has been criticized for offering untenable arguments in support of belief in unvalidated hypotheses. Although James is no longer accused of sug­ gesting we can create belief ex nihilo, critics con­ tinue to charge that James's defense of belief in what he called the "religious hypothesis" con­ fuses belief with hypothesis adoption and endorses willful persistence in unvalidated beliefs-not, as he claimed, in pursuit of truth, but merely to avoid the emotional stress of abandoning them. I argue that James's position in "The Will to Believe" can be defended pro­ vided we give up thinking of it as ethics of belief and think of it instead as an ethics of self-experimentation. Subjective data (includ­ ing wants, needs, and desires) are relevant to rational consent to participation in research.