Thanks to all the spam…

…I have decided to start closing comments on posts that are more than about a month old. I do this with some regret, as real comments continued to be added to one of my articles well over a month after I originally posted it. But the volume of spam this blog attracts has become unmanageable, especially at a time of year when I am supposed to be finishing a book manuscript and dealing with exam-related admin.

If anyone wants to comment on a post over a month old, I hope that he or she will email me to ask for comments to be opened again. I am not doing this to close down discussion – just to get rid of all those pesky Tramadol adverts.