Richard Foley

All of us get opinions from other people. And not just a few. We acquire opinions from others extensively and do so from early childhood through virtually every day of the rest our lives. Sometimes we rely on others for relatively inconsequential information. Is it raining outside? Did the Yankees win today? But we also depend on others for important or even life preserving information. Where is the nearest hospital? Do people drive on the left or the right here? We acquire opinions from family and close acquaintances but also from strangers. We get directions from and heed the warnings of individuals we’ve never met, and likewise read books and articles and listen to television and radio reports authored by individuals we don’t know personally. Moreover, we undertake inquiries in groups in which the group relies on the conclusions of the individuals making up the group. In some of these collective efforts everyone knows one another, for example, a set of neighbors taking a census of birds in the neighborhood. But others, such as the effort to understand gravity, are not so nearly self-contained. Indeed, many of the most impressive human intellectual accomplishments are the collective products of individuals far removed from another in location (and sometimes even over time) who rely on each other’s conclusions without feeling the need to re-confirm them.

Descartes, and many of the other great epistemologists of the modern period, looked to epistemology to put science and intellectual inquiry generally on a secure foundation. Epistemology’s role was to provide assurances of the reliability of properly conducted inquiry. Indeed, its role was nothing less than to be czar of the sciences and of intellectual inquiry in general. This conception of epistemology is now almost universally regarded as overly grandiose. Nonetheless, Descartes and the other great epistemologists of the modern era were not completely mistaken. Epistemology does have a foundational role to play, but not that of a guarantor of knowledge. Its role, rather, is the less flamboyant but nonetheless theoretically crucial one of providing a philosophically respectable foundation for a general theory of rationality.

In epistemology Chisholm was a defender of FOUNDATIONALISM [S]. He asserted that any proposition that it is justified for a person to believe gets at least part of its justification from basic propositions, which are themselves justified but not by anything else. Contingent propositions are basic insofar as they correspond to selfpresenting states of the person, which for Chisholm are states such that whenever one is in the state and believes that one is in it, one’s belief is maximally justified. There are two types of self-presenting states, intentional states (ways of thinking, hoping, fearing, desiring, wondering, intending, etc.) and sensory states (ways of being appeared to by the various senses). A noncontingent proposition is basic if understanding it is sufficient for understanding that it is true and also sufficient for making it justified. “2+3=5” and “If Jones is ill and Smith is away, then Jones is ill” are examples of such propositions, says Chisholm. Self-presentation and understanding are among the basic sources of epistemic justification, but according to Chisholm there are other sources as well. The most important of these other sources are perception, memory, belief coupled with a lack of negative coherence (e.g., no inconsistencies among the propositions believed), and belief coupled with positive coherence (i.e., mutual support among the proposition believed). For each of these sources, Chisholm forwards an epistemic principle that describes the conditions under which the source generates justification. Despite his thinking that there are many sources of epistemic justification, Chisholm is rightly regarded as a foundationalist because all the sources are such that they can produce justified beliefs only because some propositions are justified basically. For example, Chisholm’s principles concerning perception and memory make reference to propositions that are justified because they correspond to self-presenting states. In the case of perception, the relevant states are sensings, and for memory the relevant states are beliefs, in particular, beliefs to the effect that one remembers something..

A common complaint against contemporary epistemology is that its issues are too rarified and, hence, of little relevance for the everyday assessments we make of each other=s beliefs. The notion of epistemic rationality focuses on a specific goal, that of now having accurate and comprehensive beliefs, whereas our everyday assessments of beliefs are sensitive to the fact that we have an enormous variety of goals and needs, intellectual as well as nonintellectual. Indeed, our everyday assessments often have a quasi-ethical dimension; we want to know, for example, whether someone has been responsible, or at least non-negligent, in forming opinions. Nevertheless, epistemology, properly conceived, is relevant to our commonplace intellectual concerns. Epistemic rationality is an idealized notion, but its idealized character makes it suitable to serve as a theoretical anchor for other notions of rationality, including notions that are less idealized and, hence, potentially more directly relevant to our everyday assessments.

One of the advantages of classical foundationalism was that it was thought to provide a refutation of skeptical worries, which raise the specter that our beliefs might be extensively mistaken. The most extreme versions of these worries are expressed in familiar thought experiments such as the brain-in-a-vat hypothesis, which imagines a world in which, unbeknownst to you, your brain is in a vat hooked up to equipment programmed to provide it with precisely the same visual, auditory, tactile, and other sensory inputs that you have in this world. As a result, your opinions about your immediate environment are the same as they are in this world. You have the same beliefs about your recent activities, your current physical appearance, your present job, and so on, but in fact you are a brain in a vat tucked away in a corner of a laboratory. Thus, in the brain-in-a-vat world, your beliefs about these everyday matters are mistaken, and mistaken not just in detail, but deeply mistaken.

In “Conceptual Diversity in Epistemology,” Richard Foley reflects on such central topics in epistemology as knowledge, warrant, rationality, and justification, with the purpose of distinguishing such concepts in a general theory. Foley uses “warrant” to refer to that which constitutes knowledge when added to true belief and suggests that rationality and justification are not linked to knowledge by necessity. He proceeds to offer a general schema for rationality. This schema enables a distinction between “rationality” and “rationality all things considered.” Foley proposes how these concepts can work together in a system that “provides the necessary materials for an approach to epistemology that is clarifying, theoretically respectable, and relevant to our actual lives.”