 In other words, linguistic knowledge that could not be learned from L2 input, explicit learning, transfer from L1 knowledge, or the operation of domain general cognitive mechanisms.The field of GenSLA research experienced significant theoretical developments in the late 1990s/early 2000s following changes in generative linguistic theory inspired by Chomsky's minimalist program.These changes shifted the debate from questions solely about access to UG to the consideration of specific features in L2 grammars and how they are represented.