Did I misunderstand the thread? I thought you were confused as to whether Robin Hood was a person or a myth. You do say if anyone has any ideas or suggestions they should post them. My suggestion is it's folklore - like Beowulf, which is what the history on the subject tells us. An idyllic personality born from tales and song. (or poetry in Beowulf's case).
You misunderstood my reply, as I only said, 'we don't have to take things too seriously'. Anyway, that aside. Here is a possible explanation for myths and legends.
Many characters are based on myth, but they usually have roots somewhere.
For example: In a couple of hundred years our great, great, great grandchildren, may be trying to hunt down who the real Ex0 was. No body will know. It will be a new word in the dictionary relating to a person who had dogmatic tendencies. People might say. ‘You’re an Ex0 you are’.
From this people might try to find the original person, but they won’t be able to, because Exo was a myth, whom no one ever knew. .
I’m afraid Ex0 will have to fade into the mist, with the rest of the legends.
Conclusion: He didn’t exist!
Is it Fact or Fiction. You could be history Ex0 but no one will know.