[qzrrbz]

Although we haven't seen an "aircraft carrier" type of robot yet, the interpretation of all robots fully supported by bridge extended to all robots must have all wheels on the bridge would make that technique useless.

I would prefer believing that all robot mass is ultimately supported by the bridge, which means you obviously can't have have your wheels on the ground, you can't be touching the ground, but doesn't rule out the you can be sitting completely or partially (as is this case) on top of somebody else technique.

Here, remove 2952 from the picture, and the answer is clearly "+2 coop" even though 488 is partially atop 3743. The restrictive idea of "not all of 488 is supported (directly) by the bridge" negating this is not "a reasonable observer's" interpretation. Add 2952 back in, and place 488's bumper on 2952's bumper as it seems to be, and you get some physics component of 488's mass directed to the floor through 2952's frame and bumpers == 0 CPs. That'd be my call.