This question on renormalisation in quantum field theory had a number of comments under the main question, including one of mine; they all seemed to have been removed without any indication that they had been so. How come?
Comments are for criticizing or clarifying the question or for linking related questions, not for suggesting possible answers - that's what answers are for. The comments that have been removed were largely of the latter type. Comments on Stack Exchange are ephemeral and you should not expect any comment to be preserved indefinitely.