Agreeing and Moving across Traces: On Why Lower Copies May Be Transparent or Opaque

Within Minimalism, traces are often taken to be transparent for agreement and movement across them, which raises the question of how this could be properly accounted for within the copy theory of movement. This paper examines wh-traces in multiple wh-questions and argues that traces (lower copies) may or may not induce intervention effects depending on whether or not they are fully specified.