User blog comment:Ḡwẵine Ḹٍٍkƨ Ĺiĸe Ͼềлȑềd/WORST plot hole in the HISTORY of 'Merlin'/@comment-5515850-20121014122725/@comment-4190137-20121015053022

Yeah I'm not sure what they were on about when they made Mordred say that. So I guess the only possible theory is that Arthur forgot... which is totally unrealistic.