franko writes:
1. I exist
2. My senses sometimes work
3. Objective physical evidence is a valid way of justifying beliefs
1. I exist is not an assumption, I can demonstrate that I am a thinking agent and therefore necessarily exist. The fact that I cannot demonstrate this to anyone other then myself is irrelivant.
2. I operate on the basis that my senses sometimes work because, logiclly, it is the most pragmatic approach (regardless of if my perception of reality is accurate or not). An assumption of the fact isn't necessary, only the perception of it until a better course of action is demonstrated.
3. Objective physical evidence is a valid way to justify claims, considering this perception of reality is a paradigm based on the idea of a physical universe with no reason to assume otherwise.
=/