{"product_id":"book-fr90","title":"Existence and Necessity","description":"It is clearly explained: *What it is for a statement to be necessarily true, *Why necessity, possibility, existence, and non-existence are properties of propositions (truths and falsehoods), not of objects or states of affairs, *What conditions a class of expressions must meet if the expressions belonging to it jointly constitute a single language, *The significance for meta-linguistic research of the concepts of systematicity and productivity, as Chomsky defines these terms, and the relevance of these concepts to researches into the nature of necessity, *Why Quine's attempt to prove the non-existence of analytic truth is not only false but self-defeating, and, finally, *Why empirical science relies on truths of purely conceptual, non-observational kind to organize the data at its disposal.","brand":"Author's Republic","offers":[{"title":"Audiobook","offer_id":49421113852208,"sku":"BDfr90","price":3.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/2784\/9264\/files\/125218-fr90-Square.jpg?v=1736147575","url":"https:\/\/downpour.com\/products\/book-fr90","provider":"Downpour","version":"1.0","type":"link"}