In the three months since its publication, the Pope’s exhortation Amoris Laetitia has been described as brilliant, erroneous, confusing, groundbreaking and unremarkable. It has opened up divisions – but what is at the heart of the divisions may be something deeper than the usual to-and-fro of Church politics.

Last week, a group of Catholic theologians and clergy made the most serious intervention yet. It isn’t quite right to call it a “challenge”, because the theologians wrote – in a letter to cardinals seen by the Catholic Herald – that they neither accused the Pope of teaching heresy, nor thought the document unambiguously contradicted Church teaching.