I summarise some of the various ways in which the Turing birth centennial 

has been commemorated, paying homage to a few of his remarkable hints on how to ‘see 

further’. The third section is an outline of what I call the five classic contributions by Turing, 

those which embody what Max Newman in his early (1955) Royal Society Biographical Memoir

(Cooper-van Leeuven, pp. 5-12) referred to as their ‘unity of purpose’ (ibid., p. 7). The 

concluding section is written with my economist’s ‘hat’ firmly placed on my aged head –

wondering why so much confusion and misconceptions surround many of the claimed 

applications of computability (and Brouwerian constructivity) in applied and pure economic 

theory