Does "miss the point" mean you missed completely or just partly?

Thank you for your answer, but you are missing the point of the question.

Does the above sentence mean that the respondent missed the question completely or just did not hit the nail on the head but still answered parts of it?

• If partly: Is there consensus on how much he still hit? 20%, 50%, 80%? So If someone misses the point is it just slightly or there is barely something relevant?
• If completely: Is there an alternative word or phrase to express a "partial miss"?

Example usage: I ask a travel question on stackexchange about how I can best travel through Thailand by car during monsoon season. I get a long and elaborate answer that describes the authors experiences with a motorbike during dry season. While I can use some of his recommendations, he forgot to read my whole question or just ignored my requirements and thus his answer does not really address my needs.

The expression "missing the point" could be replaced with "missing the purpose". The questioner had a particular type of answer in mind which the responder didn't give. It is irrelevant how anyone would quantify the correctness of the answer. So yes, this is a good response to give for the example. I might say "that's not quite what I was asking" to be polite.