Question on 3 inch perimeter rule

[Sixis]

Originally Posted by squirrel

they define it pretty well, and give an example. If you wrap a string around the robot then the string describes the perimeter.

String goes across U shaped openings, so the perimeter also goes across the opening, not into the U.

I would have to argue from a geometric point of view the the string would not merely cross the opening of the "U" however loop around inside and measure the "perimeter". This is our first year participating and we are new to first so this may be something that has been recognized or acknowledged in the past, however I believe the "string around the robot" idea is just a basic concept that covers most generic robot shapes. The manual give this definition for the bumper perimeter: "BUMPER PERIMETER – the polygon defined by the outer-most set of exterior vertices of the BUMPERS when they are attached to the ROBOT". The frame perimeter is defined as such: "FRAME PERIMETER – the polygon defined by the outer-most set of exterior vertices on the ROBOT". While it does go on to talk about the string, they give an exact definition for each, which further convinces me that the string is no more than a concept. I am not interesting in starting a fight, however this seems like a debatable point which is of interest to me.