What is truth? This question has been an intangible puzzle for philosophers both today and throughout history. There are a few theories of truth, but none is perfectly satisfactory. Correspondence theory claims a proposition is true if it corresponds to a fact, for example, the statement “snow is white” is true if and only if snow is white. But it leads to another unaccountable question: what is fact? Is snow really white, or is it only white through our perception? Maybe snow is just reflecting white light, but it’s not necessarily white. Coherence theory claims that a proposition is true if it fits in with our overall set of beliefs. It is a good negative test of truth, but it’s not a good positive test. For example, we can use this theory to prove that sharks don’t live in fresh water, but we can’t prove that sharks live in certain see area with this theory. Pragmatic theory claims that a proposition is true if it is useful or works in practice. However, some proposition can be useful but not true, vice versa, like the Newton’s laws. As we
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