In Transformational Grammar, the interaction of coordination and extraction (e.g. wh-fronting) has generated a lot of interest. The Coordinate Structure Constraint is the property of coordinate structures that prevents extraction of a single conjunct or from a single conjunct. Coordinate structures are said to be strong islands for extraction. For example:
- *Who did you see and ?
- *Who did you see and Susan?
- *Which action did the president understand and ?
These attempts at coordination fail because extraction cannot affect just one conjunct of a coordinate structure. If extraction occurs out of both conjuncts in a like fashion, however, the coordinate structure is acceptable. This trait of coordination is referred to as the Across-the-Board Constraint. For example:
- What does and ?
There are other apparent exceptions the Coordinate Structure Constraint and the Across-the-Board generalization and their integration to existing syntactic theory has been a long-standing disciplinary desideratum.
Other articles related to "extraction":
... A significant driver of economic growth during the Bush administration was home equity extraction, in essence borrowing against the value of the home to finance personal consumption ... Free cash used by consumers from equity extraction doubled from $627 billion in 2001 to $1,428 billion in 2005 as the housing bubble built, a total of nearly $5 trillion dollars over the period ... stated that excluding the effect of home equity extraction, the U.S ...
... The extraction is performed in many steps (one amount of crushed plant is at least six to ten times extracted, so practically every alkaloid goes into the ... From the solution obtained at the last extraction step, the alkaloids are precipitated by either ammonium hydroxide or sodium carbonate ... through steps of concentration, extraction, and purification of alkaloids ...
... Early coal extraction was small-scale, the coal lying either on the surface, or very close to it ... Typical methods for extraction included drift mining and bell pits ... This took the form of a bell pit, the extraction working outward from a central shaft, or a technique called room and pillar in which 'rooms' of coal ...
... The sand and gravel extraction industries made extensive use of narrow gauge railways, and several of these lasted into the 1980s - this was one of the last industries to make. 1938 late 1960s 2 ft (610 mm) Eastbourne, England Shingle extraction railway on The Crumbles ... North Station Pits before 2 ... ft (610 mm) Farnborough, England Gravel extraction railway using diesel locomotives, at least two of which went ...
... Moreover, it permits extraction from low grade ores - an important consideration in the face of the depletion of high grade ores ... The potential of thermophilic sulfide-oxidizing archaea in copper extraction has attracted interest due to the efficient extraction of metals from sulfide ores that are recalcitrant to dissolution ... Between 40 and 60% copper extraction was achieved in primary reactors and more than 90% extraction in secondary reactors with overall residence times of about 6 days ...
Famous quotes containing the word extraction:
“Logic is the last scientific ingredient of Philosophy; its extraction leaves behind only a confusion of non-scientific, pseudo problems.”
—Rudolf Carnap (18911970)