Hume began his first examination if the mind by classifying its contents as Perceptions. "Here therefore [he divided] all the perceptions of the mind into two classes or species." (27) First, Impressions represented an image of something that portrayed an immediate relationship. Secondly, there were thoughts and ideas, which constituted the less vivid impressions. For example, the recalling of a memory. From this distinction, Hume decreed that all ideas had origin within impressions.

From the distinction of perceptions, Hume created his 'microscope' in order to trace all ideas back to impressions. He did this to search for the limits. If an idea could not be traced back to its impression, it was too abstruse. Hume separated the objects of human reason into two categories. First, the

Kant then continued his critique to decipher if metaphysics is possible. Kant separated the faculties of the mind and the way it thinks into three distinctive categories. First, he stated that math was exhibited through intuition. The forms of intuition were 'a priori' and had two capacities. First, intuition gave us space and time through pure intuition, and sensory data through empirical intuition. Then, Kant set up a metaphysical distinction between numena and phenomena. Numena represents the things in themselves, while phenomena represents the things for us. In this dichotomy we have no

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