during training give them an the answer they want to hear.
in everyday business of course just continue the flight. when you have the rare event of a dual loop failure inflight followed by the very rare event of an undetected engine fire during exactly this leg then lord decided it should happen this way .
correct me, but i think there is in aviation history not one event logged where first both loops decided to quit inflight and then independent of that exactly this engine on exactly this flight suddenly catched fire without notice to the crew.
cheers