“…In order to do so, they must rely on indirect negative evidence, which consists in the nonappearance of an ungrammatical structure in the L2 input (Carroll, 2001, pp. 18–19, 116; Gabriele, 2009; Gass & Mackey, 2002; Judy, 2011), and that is thus different from direct negative evidence, that is, overt corrections by teachers or interlocutors. Unlearning an L1 rule merely on the basis of indirect negative evidence is a difficult task, and one that learners often fail to accomplish even after long exposure to the L2 (Bowles & Montrul, 2008; Judy, 2011; Lefebvre, White, & Jordan, 2006).…”