Wouldn't it be nice if there were a generic learner who acquired knowledge in one or a few predictable ways? Wouldn't it be even better if we all agreed what knowledge was worth acquiring? Our models of learning would be brilliant guides to successful outcomes, and educators couldn't go wrong if they simply followed the bouncing ball of cause to effect, stimulus to response.However, with the increasing inclusion of diverse participants in the conversation about adult education, it has become clear that there is no such thing as one kind of learner, one learning goal, one way to learn, nor one setting in which learning takes place. Many theorists have convincingly demonstrated that commonly held assumptions about generic learners and learning are irrelevant and even willfully oppressive when recklessly applied to all kinds of people without regard for their unique life experiences and attributes such as race, class, and gender. Furthermore, theorists have contributed new ways of understanding who learns and how, where, and why.The theoretical perspectives of those who challenge neat and thus exclusionary models of adult learning often fall within the broad categories of critical and postmodern theory. Critical and postmodern theorists alike believe that knowledge is socially constructed and takes form in the eyes of the knower, rather than being acquired from an existing reality that resides "out there." Theorists from both perspectives are also interested in power as a factor in determining what and how we come to know a lot about certain things and not others, and have certain ideas while not others. Different individuals and groups see the world from different positions, some having more power than others. From either a critical or a postmodern