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Across-the-Board

SYNTAX: rules apply across-the-board (ATB) if they may affect all conjuncts in a coordinate structure at the same time. EXAMPLE: Wh-movement applies across-the-board in:

(i)  I wonder which booksi [Mary hates ei]C1 
     and [Sam likes ei]C2
In this case wh-movement has extracted the parallel wh-phrase which books out of both conjuncts C1 and C2. ATB extraction is the single exception to the CSC.
LIT. Williams, E. (1978)