It has been standardly claimed since Merchant (2001) that island violations can be repaired by simply deleting the categories that induce such violations, as witnessed by sluicing, an ellipsis construction that deletes TP with a remnant wh-phrase. This book aims to argue that such repair by ellipsis is simply a myth. Alternatively, the author argues for what is called the in-situ approach to sluicing, originally proposed by Kimura (2007, 2010), according to which the remnant wh-phrase in sluicing stays in situ. This approach immediately explains the island-insensitivity of...