Would defensive play be classified as gameplay? I believe that the answer is yes as they are affecting the outcome of the match.
If the answer to #1 is yes: Would the robot in possession of four disks be required to avoid all aspects of gameplay, offensive and defensive, until they are either able to remove the extra disk or the match ends? I believe that the answer is yes as well. They would need to attempt to remove the disks, not interfere with any robot movement for the opposing alliance or for their partner, not block access to the low goals or to the rollers, etc.
What is defined as "Robot Actions"? For example, shooting a disk is an action, but would sitting infront of a roller be classified as an action because you chose to sit there.
When removing yourself from gameplay, either for having four or more disks or for expanding early, would you be required to activly move away from gameplay? If Robot A were to expand early or have four disks, they would be required to be removed from gameplay. Robot A moves to the corner of the field with two rollers, as sitting in one of the Low Goals would cause a disk to be scored/descored. Robot B comes into the corner to attempt to score with the rollers. Robot A should be required to drive out of that corner and find a different location away from gameplay. Is this interpritation correct?
As stated in the Violation Notes under <SG4>
Teams can prevent an accidental or momentary expansion that does not result in an <s2> Violation from becoming a Major Violation by immediatley moving to rectify the Violation, and/or removing themselves from gameplay (e.g., parking in a corner of the field without impacting gameplay for other Robots.
Thank you for your time,