Or he's just a dream, only seen/interacted with by Picard.
"There is still hope." - Arwen, LotR "No man controls my destiny. Especially not one who attacks downwind and stinks of garlic." - Azim, ROBIN HOOD "Do you stop believing in the moon just because the sun comes out?" - Jack Frost, RISE OF THE GUARDIANS "I am no man." - Eowyn, LotR "I am Diana of Themyscira, daughter of Hippolyta, & your wrath upon this world is over." - Diana, WONDER WOMAN