Classic skeptics arrived at the conclusion that, for nearly every belief held by a people, there are people elsewhere who believe the opposite. Furthermore, the arguments in affirmation of those respective beliefs are generally just as good/valid on both sides. So, as believed by Pyrrho, the best an individual can do is go by things as they appear to him. However, one must also keep in mind that appearances are often deceptive, so one should never assume the truth of one explanation over another. That kind of complicated the view of ‘truth’ and ‘certainty’ held by philosophers from that point in history on. Thus, skeptics focused on going with the flow, so to speak, of the customs and practices which prevail in their most immediate circumstances.
This eventually led to the ever-so-popular view (which became most widely acknowledged in modern times) that certainty could never be truly available to us, especially at the level of argument, demonstration, and/or proof. All a valid argument can really prove is that its conclusions follow from its premises, which is not necessarily the same as proving that the conclusions are actually true to reality. This was taken yet even further with the conclusion that every ‘proof’ rests on unproven premises. Every proof begins with an “if” statement, which essentially begs the question, as its premise is assumed.
That is to say, for example, that given the argument – If P is true then Q must be true – the question of whether P is actually true or not is left wide open.
This is not to say that some beliefs cannot be determined to have better, or more solid, grounds than others, but proving such can be a tricky endeavor.
My argumentt here is that not all premises must, necessarily, beg the question of their own truth. That is, more specifically, in cases in which the premise is formulated from very basic experience, or sensory perception. For instance, I can say that if nourishment of the body is necessary for persistance, then it must be true that animals need food and water to stay alive. Although this premise does beg the question to some degree, the answer to that question seems obvious. One can go anywhere, or observe the habits of any animal, to find the truth in this premise. Therefore, to me, it seems as though the only self-affirming premise is one of basic sensory perception. Something that one can observe and deduce in natural reality without effort. The only pitfall, as far as I can tell, is an instance in which the senses of an observer are impaired; making a naturally effortless observation something far more difficult to explain. So, a skeptic must still remain skeptical by the same merit, given the chance of a deviation from the norm.
This is kind of where Hume comes in and refines the idea of the skeptic by asserting that, in order to live, we all remain in a perpetual state of decision making that forces us to form judgements about the way things are, whether we like/acknowledge it or not. Being that we have already concluded certainty to be unavailable, or elusive at the very least, Hume went on to agree that we must make the best assessments we can of the immediate realities we face, respectively. Thus, on an individual level, absolute, or “equal opportunity”, skepticism cannot exist. And, furthermore, such a view of skepticism is impractical. Therefore, as Hume put it, our skepticism must be mitigated. In other words, as our beliefs pertain to reality, our skepticism must remain at a middle ground between demanding a degree of certainty that we can never attain and treating all possibilities as if they were equally true.
This focus on one’s immediate circumstances, or reality, in conjunction with Hume’s mitigated skepticism, seems to me the initial grounds for forming a “woking hypothesis” by which an individual can live. In other words, some basic assumptions must be made in order for us to reach any further conclusions about reality–
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Our beliefs pertaining to reality must have a greater focus on our immediate circumstances, or direct experiences, rather than an attempted overall grasp of all possibilities.
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Perception will simply not allow all possible alternatives to be regarded with equal skepticism.
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Logic does not necessarily communicate truth, but, rather, systematically analyzes that which we already consider truth.
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The most basic foundation, or proof, of truth is direct experience, whereas the most basic foundation of logic is the assumption that certain experiences hold true regardless of circumstances.