It began with an ordinary conference itinerary.
There were sessions, speakers, a hotel near the venue and a return journey arranged around the final afternoon. Most people arrived with little time to spare and expected to leave once the last panel had finished.
The formal programme did what it was meant to do. It brought people into the same room, gave shape to a subject and created introductions that might otherwise have taken months to arrange.
But a conference is not always where the most useful conversation has room to happen.