My family had a discussion regarding this and I suppose the conclusion is that I have mentally "lost it". About six years ago they changed my plate number and now I am clueless to remember it. And, do you know how many blue minivans are in any given parking lot? When I see the right car and plate then the number sits nicely in my head. For about one minute. Then if I move to a different store it is again gone from my head. Also any time I get nervous all numbers leave my head. In an emergency situation I have to refer to a note in my wallet. This seems to happen mainly with numbers. Some times I don't even recall my own cell phone number? OK I also admit to sometimes not being able to spit out the word that is at the tip of my tongue.... either in conversation or email. Sometimes hours later I will shout out the word. Seems like it is on "hold" in my brain and appears at a later time.