User blog comment:Morganaforever/Series 4 Cliffhanger/@comment-141.0.9.65-20120223104004/@comment-4650675-20120223115826

I agree that they can't possibly be dragonlords and that's why I also reject those theories. However, Merlin, Gaius and the Great Dragon have all been wrong at times. For example, Gaius wanted Merlin to prevent Morgana's destiny but instead he made him "activate" the evil Morgana. Also, Merlin wanted to stop Morgana from killing Uther but because of that she learnt the truth of her birth and now wants the throne for herself and stops at nothing to have it. So yeah, there is no character who has never been wrong about something.