Is Justified True Belief Possible?


The only thing we can know is what we believe we know – but to know in itself is impossible. This is because there is no means of justification that is in itself not reliant on other propositions. When we try to justify any belief, we must ensure this justification is valid, and that that validation is also valid, and that that validation is also valid, ad infinitum. An infinite regress, however, is not necessarily problematic.

Consider by analogy the concept of π (pi). We use π to make calculations regarding a circle’s circumference in relation to its diameter. However we don’t actually use π in our calculations, we usually use the approximation of π, sometimes 3.14. π, however, is an irrational number whose decimal representation never ends and never settles into a consistently repeating pattern. The more decimal places we add to π, however, the more accurate our…

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