Applicant: Hello. I'm here for that job for which you need a technician. My grammar is good. For example, I never end a sentence with a preposition. *smile*
Employer: Oh, that don't matter. *smile* We gotta do some stuff with computers, websites, y'know, crap like that. *light a cigar* *cough* Really, that ain't no problem... *smile*
Anyway, the rule "no past perfect with a specific point in time" doesn't exist in any ESL book. The rule you usually find is actually "no present perfect with a specific point in time". Nothing is said about the past perfect, which is perfectly ok even when we want to refer to very specific points in time. Sometimes it's even necessary:
I was so shocked. I had just checked it a few seconds before, and it was there. Then I turned my head and it was gone. There's a ghost there, trust me.If I'm not mistaken, you can't use a simple past there, and say "I just checked". I guess it's because of that "just". Right?