Entanglement situations should be considered outside of “normal gameplay” and result in <G13> Violations when a Robot that is playing offensively is tipped, Entangled, or damaged by an opponent Robot that is playing purely defensively. Per <G14>, the offensive Robot gets the benefit of the doubt if a judgment call must be made.
In cases where it's not clear which Robot should get the benefit of the doubt from rule <G14>, a Robot that is actively interacting with a Ring (including de-scoring) should be considered "more offensive" than a Robot that is not interacting with a Ring.
If both Robots are playing offensively (for example, two Robots that are pushing each other back and forth while each is trying to put a Ring on a Wall Stake) it should generally qualify as normal gameplay that does not result in a <G13> Violation for either Team even if they become Entangled.