I was teaching UNIX system programming to a bunch of programmers. I was explaining that when a parent forks, the newly created child does not know who the parent is, unless it makes a call the system to find out (getppid). At this point, someone shot a question from the back of the class: Student: "So, the child does not know who the parent is"? Me: "That's right". It needs to make a call to find out". Student: "Hmm..., Dan Quayle is not going to be happy about this one". Needless to say, it took quite a while for me to teach again. -- Sathis Menon College of Computing Georgia Tech.
(From the "Rest" of RHF)