“…Even more remarkably, the nativelike pattern differentiates between two relatively complex and unacceptable types of sentence, which the learners cannot transfer from the native language and they have not been taught to reject. Such findings and others like it are suggestive of access to universal grammatical principles (e.g., Dekydtspotter, Sprouse, & Anderson, 1998;Dekydtspotter, Sprouse, & Swanson, 2001;Hopp, 2005 In principle, it should be relatively easy to disprove claims of a logical problem: Show that there are no instances of PoS or, when it is agreed by all that input alone is insufficient to explain resulting competence, that the grammatical knowledge in question falls out straightforwardly from domain general cognition and/or processing principles. That there is no logical problem has been argued rather extensively (e.g., Bybee, 2010;Evans, 2014;Gerken, Wilson, & Lewis, 2005;Goldberg, 2013;Gries, 2012;O'Grady, 2005;Redington, Charter, & Finch, 1998;Tomasello, 2003).…”