Semantic categories in the world's languages often reflect a historical process of chaining: A name for one referent is extended to a conceptually related referent, and from there on to other referents, producing a chain of exemplars that all bear the same name. The beginning and end points of such a chain might in principle be rather dissimilar. There is also evidence supporting a contrasting picture: Languages tend to support efficient, informative communication, often through semantic categories in which all exemplars (...) are similar. Here, we explore this tension through computational analyses of existing cross-language naming and sorting data from the domain of household containers. We find formal evidence for historical semantic chaining, and evidence that systems of categories in this domain nonetheless support near-optimally efficient communication. Our results demonstrate that semantic chaining is compatible with efficient communication, and they suggest that chaining may be constrained by the functional need for efficient communication. (shrink)

Elaborating the analogy between the sun and the good, Plato's Socrates tells Glaucon to divide a line αβ into two unequal segments at γ. The result is that αγ represents what is intelligible and γβ what is visible.1 Then Glaucon is to divide each of the two segments by the same ratio as he used in the original division.2 Whatever proportion he used to make the cuts γ, δ, and ε in the divided line, generating its four segments, the geometrical (...) implication is that the two middle segments must be equal in length. As both Nicholas D. Smith and Richard Foley have emphasized, when Socrates reiterates the characteristics of the line at 534a3–5, transposing δγ and γε, there should be no doubt that Plato... (shrink)

Thomas More’s Utopia, a book that will be 500 years old next year, is astonishingly radical stuff. Not many lord chancellors of England have denounced private property, advocated a form of communism and described the current social order as a “conspiracy of the rich.” Such men, the book announces, are “greedy, unscrupulous and useless.” There are a great number of noblemen, More complains, who live like drones on the labour of others. Tenants are evicted so that “one insatiable glutton and (...) accursed plague of his native land” may consolidate his fields. Monarchs, he argues, would do well to swear at their inauguration never to have more than 1,000lbs of gold in their coffers. Perhaps this is one reason why Utopia is... (shrink)