Here's an interesting twist. What if there was a holodeck program called Lord of the Rings, and inside one of the holodecks a vulcan grew up in Rivendell, and when he reached adulthood, suddenly the program ended and the doors opened up to the rest of the ship? The Vulcan of course thinks he's an elf, he looks just like them, but all the other elves he knew were holodeck characters and only he were real. What do you suppose would happen next?