as they affect secondary qualities (colors, taste, and smell). Locke is very vague in some of his descriptions, as he talks about self awareness he acknowledges that man exists as material and immaterial substances (he has no definition for substances) and god has given him power of thinking. Unlike Descartes, Locke holds that sense perception as fundamental tool in the world. The new science takes a cautious approach to sense perception. Locke takes the approach that you cant know the certain knowledge. Certainty can only be gained in ideas and knowledge of the physical world rests on judgment. Locke doesnt ground for the distinction of the sciences rather he is an under laborer of new science while Descartes lays the groundwork for the new sciences.How can we know that the fundamental properties of the world are those and only those that the new science identified as fundamental? For Descartes, it basically comes down to clear and distinct perception. If there is no way to argue against the property and have no doubts of its existence or its reality then it is a property. We have already listed what the fundamental properties are. Descartes supports all the properties in his Meditations as clear and distinct. If there are other properties that are being derived from the fundamental properties and they are clear and distinct perceptions then they will be valid properties. As Descartes says you can trust your clear and distinct perception because God is not a deceiver, Meditation 5. The question also asks how can we know that the properties are those that the new sciences identify as their fundamental properties. This is a easy question to answer basically, because it was Descartes you wanted to clean out all our beliefs in the beginning of the Meditations and start from the most basic of all beliefs that we make arguments and build on what is certain. The reason why I say that the question was easy to answer is because ...
