To maintain the strictly binary and right branching structure, at least two instances of movement ( or copying ) are necessary.
3.
I'm not sure exactly which of the'principles'is relevant to this one, but it's something more or less along the lines of Minimal Attachment ( an amalgamation of several of Kimball's principles ) and Right Branching & mdash; the idea is that once you've already read " the man was brave " and closed it off ( thinking it to be a complete sentence ), encountering " who . . . " and trying to integrate it is difficult.