... account of knowledge. Within the discipline of philosophy, epistemology is the study of the nature of knowledge and justification: in particular, the study of (a) the defining components, (b) the ... with respect to the content of the acceptance. The reasoning system of S at t over acceptances,’ means the set of propositions true at t of the form, ‘S reasons from acceptance of the premises ... t of the form, ‘S accepts that q,’ where each acceptance has the objective of obtaining truth and of avoiding falsity with respect to the content of the acceptance. The preference system of...