“Possessing – A Robot is considered to be Possessing a Scoring Object if it is carrying, holding, or controlling the movement of any Scoring Object(s) in the Robot. Pushing/plowing Scoring Objects is not considered Possession, however using concave portions of your Robot to control the movement of Balls is considered Possession.”
Perhaps I’m misunderstanding what exactly “concave” means here, but by my interpretation, a robot that has a U shape made by three pieces of C-channel connected at 90 degree angles could collect several balls and push them around. This type of action seems to match the spirit of the definition but not the letter of the definition: three pieces of metal connected at 90 degree angles are not concave (or is this my misinterpretation?), but can clearly be used to precisely control balls in a way that a concave contraption is not allowed to.
Is my interpretation correct that such a U-shaped device could push more than 4 balls? If not, could you give a precise definition of “concave”? Thanks in advance!