Sri Lanka, Oct. 30 -- A few weeks ago, writing on the library that is Professor Desmond Mallikarachchi, I recounted a conversation that took place more than twenty five years ago at the end of a thesis defence. My last official words to the committee were as follows: 'I have come to understand that the distinctions between sociology, philosophy and literature are arbitrary and false. I do understand the need for disciplinary boundaries and that you are required to make sure I stay within them.

The words just came out. Partly as an excuse for incompetence. And in part because I wanted to diffuse a tense situation. Deep down, though, I was speaking the truth of my convictions. The moment returned a couple of days ago.

I was revisiting Des...