There is often some confusion surrounding the terms: belief, disbelief, agreement and disagreement when used in a philosophical context. We need to keep in mind that normal dictionary definitions are often not precise enough to be used in a philosophical context where precision and clarity are essential. (For analytic philosophy.) In this article I will explain the terms 'belief' and 'disbelief', and 'agreement' and 'disagreement'. Then I will suggest a new way to define the terms in the name of clarity.