The Origin of the Word "Scientist"

At one meeting, chaired by William Whewell, Coleridge was drawn into a passionate discussion of semantics. It revolved around the question of what exactly someone who works ‘in the real sciences’ (as he had phrased it) should be called. This is how Whewell reported the British Association debate in the Quarterly Review of 1834: Formerly the ‘learned’ embraced in their wide grasp all the branches of the tree of knowledge, mathematicians as well as philologers, physical as well as ant...

 Conjecture versus Theorem

Mathematicians use the idea of proof to make a distinction between a 'conjecture' and a 'theorem', which bears a superficial resemblance to the OED's distinction between the two senses of 'theory'. A conjecture is a proposition that looks true but has never been proved. It will become a theorem when it has been proved. A famous example is the Goldbach Conjecture, which states that any even integer can be expressed as the sum of two primes. Mathematicians have failed to disprove it for all eve...