If the speed gets too slow because Bloggs continues to pull/hold the nose up, any decent AT system will spring to life regardless of previous pilot selections and save the day.
Apparently the 777 doesn't do this.
It will in any mode EXCEPT "Hold"- INCLUDING disengaged!
Answering Wizofoz saying it will in any mode EXCEPT hold , including disengaged
Itīs not true ...you seem to mix ARMED and DIDENGAGED/DISCONNECT functions
Even in HOLD mode , A/T will react , I agree lately , but it will react provided A/T arm switch on the MCP is armed which is always the case .
Precisely, when speed is approaching middle part of speed amber scale , your autothrottle becomes "awake" , Speed mode engages et your auto throttle is keeping speed on top of speed amber scale which is MMS minimum manoeuvring speed.
More info on PLI activation, caution air speed low and trim inihibits are available by your nearest retailer ..