JesterTerrestrial hit the nail on the head. It's just a glitch in the Matrix. If linear time is just an illusion in the holographic universe the only time is NOW. We perceive time only as a result of memory. Take away our memory we could not detect time, we would exist only for the moment. So have we lived out our lives already? if there is no past or present based on a circular curve of time it explains the glitch of deja vu flashing to our consciousness.
deja vu is a result of space-time continuum. See my thread if the topic interests you.
http://projectavalon.net/forum/showthread.php?t=7719
Take care my friends