entanglement

[roboticscom13]

I don't know if anybody here has touched on this issue or not but what is entanglement?
I think that the refs in all of these compitions want to avoid controversy by not calling it but what is the point for this rule if NOBODY calls it. In the two regionals events (that i have been to and ones i heard about) there were multiple situations in which entanglement should have been called especially one yesterday in the philadelphia regional. My team 357 was clearly entangled with another robot's tether (which was a scissor kind of tether)and when we couldnt free ourselves during the time of play, and when we went to take it off the field (even when the judges tried it was still very difficult) we knew surley this would be entanglement. But of course entanglement was not called. I guess im frustrated because some teams kept a tether out of their original design because of this rule... What is the point of having this rule if it is not called?!