You are at an event and someone says hello to you.  You have no clue who they are.  Don’t you hate when that happens.  It could be that you are suffering from prosopagnosia.  Yes it is a clinically recognized disorder and it has an expensive sounding name.   Prosopagnosia is the inability to recognize faces.

Who is this?

I suppose that it won’t be long before there is a disorder named for the inability to stop posting on facebook.  Or one for people who compulsively write blogs.