1. These correspond closely, indeed, to the ‘ideals of natural order’ of ‘paradigms’ — the term was borrowed from Wittgenstein — discussed in my 1960 Mahlon Powell Lectures at Indiana University, published in 1961 as Foresight and Understanding.
2. R. G. Collingwood, An Essay on Metaphysics, Clarendon Press, Oxford, 1940, p. 73. (Italics not by Collingwood.)
3. Op. cit., p. 48.
4. Loc. cit.
5. See Lewis Carroll’s famous article with this title in Mind N.S. 4 (1895) 278–80.