[Deja vu -e]

I don't know whether this has been discussed recently, but why do we say we have it in spades?

I have the strangest feeling that we've discussed this and it didn't stick in my brain.

If someone will just toss me a crumb of explanation, thanks. I'm not in a searching mood this morning.

Thanks,
DubDub who really does think I've asked this very same question...wonder why it didn't stick?