Willard Quine's early work was in the field of mathematical logic and set theory, the subject of half a dozen of his 23 books.

ECONOMIST: Willard Quine

Some years later, Claude Shannon (also of Bell Labs) would consolidate many of the prevailing ideas on the subject in his 1948 paper "A Mathematical Theory of Communication" which would reference the work of Nyquist significantly.

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How this tiny dot in the middle of the South Pacific came to be inhabited is the subject of some debate, but the most widely accepted theory is that Polynesian seafarers arrived from the west around 400 AD, perhaps from their nearest neighbour, the Pitcairn Islands.

BBC: Easter Island��s greatest festival

But the theory that oral bacteria pose a threat to the heart is another subject of intense medical debate.

CNN: Brush your teeth, save your life?

It was taught as a special subject quite distinct from the theory and practice of architecture.

UNESCO: Intangible Cultural Heritage

The edifice belongs to one of three world heritage sites in Georgia, and in theory, is subject to UNESCO's rules.

ECONOMIST: UNESCO and Georgia

An aside on the theory of rational expectations, for instance, shows that he has not bothered to check an elementary textbook on the subject.

ECONOMIST: PPE of global capitalism