I think we're getting closer. I still see the definition of mark room as being restrictive: the inside boat is entitled to room to round the mark, not room to sail to Canada then come back and round the mark.

I've searched the case book, and wonder if there isn't a case cited simply because once outside of the reasonable space defined as mark-room, the inside (windward) boat would be breaking other Part 2 rules if she didn't headup when luffed, etc.

Put it this way, if I'm outside and leeward, you're inside and windward, the seas are flat, the breeze is moderate and no one else is around. As soon as you pass the lay line, I'm heading you up to tack. I'll follow the rules and keep clear while turning, but what rules are going to be on your side if you don't respond?

BTW spectators, Eric, Matt and I typically agree on most of these...

Mike