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Bonjour And The Moderate Empiricist View Of A Priori Reasoning

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Bonjour explores the moderate empiricist view of a priori reasoning as contrasted by the rationalist view of a priori reasoning. He first describes the moderate empiricist view as “a priori justification limited to the consequences of definitions or meanings” (Bonjour 78). This view of a priori reasoning points out that as long as we understand the definition of the concepts embedded in the proposition, then there is sufficient evidence for the claim to be justified. In addition, the moderate empiricist holds the view that all meaningful knowledge stems from our sensory experiences. The rationalist view on the other hand, depends less on the understanding of the concepts, and more on concrete evidence. The rationalist holds the view that a priori justification is achieved through reason rather than experience.
To further explore the moderate empiricist view, Bonjour uses the example of a bachelor. If we were to take into consideration the proposition that all bachelors are unmarried, the moderate empiricist view would state that if we have the concept of a bachelor, then that is all we need to have a priori knowledge (Bonjour 79). Bonjour further points out that there is no need to go around collecting data in order to conclude that this proposition is true (79). In this case, the two concepts are interrelated, and thus knowing one, will allow us to know the other.

In addition to Bonjour’s opinion of moderate empiricism, Hume points out that a priori knowledge depends on the avoidance of contradiction (79). In light of Hume’s added insight, Bonjour attempts to further explain the concept of moderate empiricism by presenting a contradiction. If we can provide the definition that a bachelor is an unmarried man, then we can easily reword the proposition to state that: all unmarried men are unmarried. By substituting the meaning of a bachelor into the proposition, we can more clearly see how these terms are connected. Now, let’s negate the proposition to say that some bachelors are not unmarried. From here we can say that some unmarried men are not unmarried. In other terms, some unmarried men are married. This places us at a contradiction since it is impossible for someone to be both married and unmarried

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