The premise for the essay is that knowledge management (KM) has not sufficiently discussed the concept of knowledge, leading to a cloudy conceptual use. In this essay, Plato’s epistemology, and the view of knowledge within the KM, is examined to build a better view of knowledge as a concept. The analysis is specifically placed on tacit knowledge and dialectics to clearly define it. The method used is qualitative content analysis. The main findings of the essay is that organizations should work with the dialectic approach in their knowledge work, and view dialogues among employees as processes. Even though the dialogues may not always lead to something substantial, they are not wasted because they lay the basis for future conversations and learning. In that regard, one can say that there is a connection between Plato's theory of knowledge and KM, but there are also aspects that are not related. KM, for example, views knowledge as a source of business’s economical profit, which is a perspective that does not fit with Plato's understanding of knowledge. Neither does Plato's rationalism or idealism fit into today’s KM that uses a pluralistic knowledge approach.