What does the feeling of Déjà vu tell us about 'a posteriori' knowledge?

it tells me that philosophers will go to great lengths to find ways to argue.

:)

the feeling of deja vu might tell me any number of things.

sometimes I find that I have had a dream of this moment years ago,

sometimes I feel familiarity with someone I'm just now meeting, because they play an important role in the future.

sometimes I realize that this moment feels familiar, because I created this moment long ago, and the practical present has caught up with the probable future.

my reasoning is based on the ideas that the future has already happened, and the past has fresh experience.

I've never really felt a sense of deja vu. In the past, when I've said something like "Wow, I just got a sense of deja vu," I knew for reals that it really wasn't that, it's just that two very similar actions happened in sequence, and they were so similar that it invoked that word out of me as a joke.

But I've never really sensed that feeling in the true spirit of the way it is intended, so…

I guess I do not know. (By the way, one of my cousins thought Agnosticism was a respiratory illness such as asthma.)

Here's something interesting for you.

I think we both, and possibly many, have had deja vu at around the same time.

I JUST recently had it, like yesterday and maybe today too.

It freaks me out every time, it's rather existentially painful actually, personally.

This video explains Deja Vu pretty well:

http://www.youtube.com/watch?v=CSf8i8bHIns

deja vu is all in the mind. It is delayed synapsis.