the perfect does more than merely make an event inferrable
The choice between extraposition and nonextraposition for discourse-old and inferrable subjects is examined and is shown to depend on the discourse status of the predicate and on whether it is the predicate or the subject that links to the following discourse.
Section 3 examines that-clause subjects and concludes with the central claim of the paper, namely that nonextraposition is only possible if the content of the clausal subject is discourse-old or inferrable.
6) Extraposition of infinitival VP sentential subjects is necessary if the reference of the VP is discourse-old or inferrable.
In each case, the information in the consequent is predictable, or at least easily and uncontroversially inferrable, given the content of the como clause, as well as the background of the ongoing discourse context.
Though S leaves the apodosis of this conditional implicit, it is easily inferrable given what he has said previously in the same turn.
The example in (31), also from CHILDES, illustrates an elliptical como-conditional clause whose elided apodosis is easily inferrable as expressing an undesirable consequence.
For (10B) to be used appropriately, the proposition that B needs something must not only be mutually known but it must also belong to the current discourse register, that is, it must have been somehow activated in the minds of the speech participants, or else it must be easily inferrable from something that has been activated in their minds.
Even though the denotatum `inside' is inferrable from the denotatum `envelope' in the immediately preceding utterance (envelopes are containers), it has a focus relation to the proposition.
As in (16), the denotatum of the focus phrase (female stars) is inferrable from elements in the preceding utterance.
However, it is clear from his discussion that in many instances it, too, contains information that could well be characterized as given or inferrable.
Delin distinguishes three information statuses, old, inferrable, and new, defined as in (16).