ABSTRACT
That ordinary knowledge exists is taken for granted by people at large. In order to cope adequately with nature and other people, one must be equipped with so-called ordinary knowledge. It is natural to contrast ordinary knowledge with scientific knowledge. The goal of ordinary knowledge is not primarily theoretical but practical. As such, it is not basically concerned with explanation or prediction or even with control. The characterisation of ordinary knowledge is dependent upon rejecting the positivist account of scientific knowledge and its domain. The problem of epistemology may be tackled as the problem of ordinary knowledge or as the problem of scientific knowledge. It is said that classical logic shuns relevance because it is notoriously difficult to formalise. However, the recent efforts of relevance logicians have shown that the task is not impossible, even if the systems they have so far produced are not without flaws or above criticism.
