This does not mean that haecceities cannot fall under the extension of a concept.
(Theorists who regard art as an invention of eighteenth-century Europe will, of course, regard this way of putting the matter as tendentious, on the grounds that entities produced outside that culturally distinctive institution do not fall under the extension of "art" and hence are irrelevant to the art-defining project (Shiner 2001).
Rather, they are seen as paradigms or prototypes against which we compare something to distinguish, or bian, whether or not it falls under the extension of a term, such as 'yi' (duty, righteousness).
The extension of a concept is something like the set of all objects that fall under the concept, for the extension records all of the objects that the concept maps to The True.
Apart from their main duties, the DAs are expected to engage in additional activities such as distributing fertilizer, the collection of credit and taxes, and other government activities that do not typically fall under the mandate of extension (Davis et al. 2010).
But not everything falling within the extension of 'oxen-and-horses' is oxen.
In semantic terms, this amounts to the constraint that an object in the extension of a property at a world must fall under the range of the quantifier at that world.
When the ε is prefixed to a concept variable, e.g., as in εF, the resulting expression is a kind of complex variable that ranges over extensions: for each value of the variable F, εF denotes the extension of F. Note that it seems natural to identify these two extensions given that all and only the objects that fall under the first concept fall under the second.
Fassel, who earns $800,000 a year, would receive a raise to about $1.1 million under the extension.
It may be objected that every concept must have an extension, that there must be a definite totality of objects that fall under the concept.
Critics of this component of the digital copyright reform package also warn it's unclear what kinds of news content will constitute a snippet, and thus fall under the proposal — even suggesting a URL including the headline of an article could fall foul of the copyright extension; ergo that the hyperlink itself could be in danger.
