The Logic of Scientific Discovery is a 1959 book about the philosophy of science by the philosopher Karl Popper. Popper rewrote his book in English from the 1934 (imprint '1935') German original, titled Logik der Forschung. Zur Erkenntnistheorie der modernen Naturwissenschaft, which literally translates as, "Logic of Research: On the Epistemology of Modern Natural Science"'.
Popper argues that science should adopt a methodology based on falsifiability, because no number of experiments can ever prove a theory, but a reproducible experiment or observation can refute one. According to Popper: "non-reproducible single occurrences are of no significance to science. Thus a few stray basic statements contradicting a theory will hardly induce us to reject it as falsified. We shall take it as falsified only if we discover a reproducible effect which refutes the theory". Popper argues that science should adopt a methodology based on "an asymmetry between verifiability and falsifiability; an asymmetry which results from the logical form of universal statements. For these are never derivable from singular statements, but can be contradicted by singular statements".
The psychologist Harry Guntrip wrote that its publication "greatly stimulated the discussion of the nature of scientific knowledge", including by philosophers who did not completely agree with Popper, such as Thomas Kuhn and Horace Romano Harré. The psychiatrist Carl Jung, founder of analytical psychology, valued the work. The biographer Vincent Brome recalls Jung remarking in 1938 that it exposed "some of the shortcomings of science". The philosopher Paul Ricœur endorsed "procedures of invalidation" similar to Popper's criteria for falsifiability. The historian Peter Gay described the work as "an important treatise in epistemology". The philosopher Bryan Magee considered Popper's criticisms of logical positivism "devastating". In his view, Popper's most important argument against logical positivism is that, while it claimed to be a scientific theory of the world, its central tenet, the verification principle, effectively destroyed all of science.
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Verificationism, also known as the verification principle or the verifiability criterion of meaning, is the philosophical doctrine which asserts that a statement is meaningful only if it is either empirically verifiable (i.e. confirmed through the senses) or a truth of logic (e.g., tautologies). Verificationism rejects statements of metaphysics, theology, ethics, and aesthetics, as cognitively meaningless. Such statements may be meaningful in influencing emotions or behavior, but not in terms of conveying truth value, information, or factual content.
A hypothesis (: hypotheses) is a proposed explanation for a phenomenon. For a hypothesis to be a scientific hypothesis, the scientific method requires that one can test it. Scientists generally base scientific hypotheses on previous observations that cannot satisfactorily be explained with the available scientific theories. Even though the words "hypothesis" and "theory" are often used interchangeably, a scientific hypothesis is not the same as a scientific theory.
Critical rationalism is an epistemological philosophy advanced by Karl Popper on the basis that, if a statement cannot be logically deduced (from what is known), it might nevertheless be possible to logically falsify it. Following Hume, Popper rejected any inductive logic that is ampliative, i.e., any logic that can provide more knowledge than deductive logic. In other words if we cannot assert it logically, we should at the least try to logically falsify it, which led Popper to his falsifiability criterion.
In the work of English author/mathematician/logician Lewis Carroll (Charles L. Dodgson), questions of language and meaning constantly lurk beneath the surface. As a literary genre, Carroll’s nonsense has been shown to address changing theories of language ...
When moving from known-input security to chosen-input security, some generic attacks sometimes become possible and must be discarded by a specific set of rules in the threat model. Similarly, common practices consist of fixing security systems, once an exp ...