“Behind much of the frothy speculation and accusation was an older, subtler and more intractable conflict between the myths of poetry and the realities of the modern university. What we may be willing to put up with from a poet — in Mr. Walcott’s case, and perhaps Ms. Padel’s as well — is different from what we’re willing to put up with from a professor, which can be quite a problem when the poet is expected to profess.”