Final answer:
King Arthur is a legendary figure with some references to a historical warrior leader, but his existence as described in tales around A.D. 500 lacks conclusive evidence and is largely mythological, making the statement false.
Step-by-step explanation:
The figure of King Arthur, who was supposed to have lived around A.D. 500, is a blend of historical and mythological elements. While there is no conclusive evidence that King Arthur existed exactly as depicted in medieval legends, there is some historical basis for a warrior leader around that time who could have inspired the tales.
However, due to the lack of clear historical records, the statement regarding King Arthur's existence around A.D. 500 is largely considered more mythological than factual, making the provided statement false from a strictly historical point of view