In fact if you watch all the clips on the rte page you will see Luke Kelly is in the room while Mr Kietly tells his story and he does not challenge it in any way. Incidentally Kelly says that Kavanagh suggested he should sing "Raglan Rd", rather than either Miriam or the dawning of the day perhaps adding a little weight to the idea that the song already had this title rather than being subsequently renamed by the Dubs. Not at all conclusive but perhaps just a little more weight in the scale.