Karl Popper was a brilliant philosopher British 20th century, born in Vienna and close to the Vienna Circle Neopositivism, focused on the philosophy of language whose distinctive methodology is the Falsacionismo. Philosophy must delimit clearly the field of science that is different from the philosophy and other knowledge because it supports only falsables claims, i.e. those that can be to an experiment that shows us that they may be false. This is the criterion of demarcation of scientific propositions and which are not. Thus, for example, is not scientific proposition: "God exists", because we can not prove that it is false.
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