Sherlock Holmes, the fictional sleuth who famously resides on Baker Street, is known for his impressive powers of logical reasoning. With a quick visual sweep of a crime scene, he generates hypotheses ...

Scientists do not confirm hypotheses, they may only corroborate or decisively refute them. —excerpted from The Logic of Scientific discovery (London: Hutchinson, 1959) by Karl Popper A scientist, ...

As this is the fourth edition—though enlarged and partly re-written—of the work under notice, it is not necessary to review it in detail. It is sufficient to mention, by way of reminder, that for the ...

Deductive Cogency holds that the set of propositions towards which one has, or is prepared to have, a given type of propositional attitude should be consistent and closed under logical consequence.