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1) The only information we have about anything is what we perceive through our senses.
2) Our senses indicate that they are fallible.
3) It is not possible to make decisions without any information.
4) Lacking any other better sources of information, we must use our senses to make decisions even though they are fallible.
5) Therefore although we cannot prove an objective reality, we must assume there is one in order for there to be any reasonable method of thinking.
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