Spreading Innovations II

Posted earlier on the problem of spreading innovations in the US Army.  Another example, which may be familiar: anyone who has a reputation for knowing technology, for being able to program VCR's or whatever the current standard is, perhaps has had this experience.  You show someone who is less knowledgeable, perhaps an older relative, a neat way to accomplish something they'd like to do: find out the weather in Dublin by doing a Google search for "dublin weather".  They're duly impressed and seem to comprehend what you've demonstrated.  But, next week or next month, a similar situation occurs and the person doesn't use the knowledge you've passed on.