When we say something, claim something such as 'The kettle has boiled', we assert something; we express a belief. A belief is an attitude we take towards a proposition: to believe a proposition is to accept it as true. Assertion is a truth-claim, and belief is a truth-attitude. Assertion, belief, and truth are internally related in this way. From the outset we have been working with an intuitive understanding of truth such that to say that a claim is true is simply to say that things are as the claim says they are: To assert that a proposition is true is equivalent to asserting that very same proposition. What this means is that a pair of sentences such as the following:
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