I do not see a way to repair the question without altering its intent. It would be fine for me if the question was something like "what are other nice applications of this technique," but the operative word in the question is whether the technique is always applicable, and this question is at the wrong level of generality. This is a common symptom of many of Chandru1's questions, and as he is a graduate student I really do not feel it is our responsibility to point out the need for him to think harder about this; it is entirely his. I think you are giving him too much credit for the question you wanted him to ask rather than the question he actually asked.

I do not see a way to repair the question without altering its intent. It would be fine for me if the question was something like "what are other nice applications of this technique," but the operative word in the question is whether the technique is always applicable, and this question is at the wrong level of generality. I think you are giving the OP too much credit for the question you wanted him to ask rather than the question he actually asked.