I suppose one could generalise from that > never seek to buy any discounted share which has come through a rough ride and may be on the turn because 'the Titanic was unsinkable'.
It was a non-answer to a perfectly straightforward question: buy shares in Northern Rock? People come here to ask straightforward questions to get straightforward answers: not to give you space to trawl for questions not phrased to your total satisfaction so that you can fill up the answer section with garbage.