Have anyone tried to see or experienced an old memorie again that you had completly forgot? From what i have read over the years the mind "cleans" out memories that it does not find important.
When you delete something on a computer it isn't really gone because it can still be brought back with special tools. The only way to be sure of destroying something secret on a computer is to melt it down. What if this is true with our brains to? Maybe it's stashed away where we can't reach it without a special tool that's in this case is lucid dreaming. Things of testing to see this old memories again could be to imagine a door with the text "My 1 birthday" for example and then walking trough it to see if you would go there.

Do you think we have more access to our brain in the lucid state?