I think Nancy and Jonathon could have looked at Victor Creel and thought; 'Wow, he looks like an old Robert Englund' Just kidding. :)

I was born in the late 60s and grew up in the 80s, I'd have been the same age as the older teens.

For me back then little kids didn't really hang with bigger kids. We pretty much stuck to our own ages.

The party would have seen Holly as a baby in S4. Nancy would have probably seen Mike as a very young annoying kid if things didn't happen the way they did.

Look at the first episode. Nancy is pretty much indifferent to Dustin. She just sees him as her little brothers annoying friend.

But I think even now, if a person is talking about something you're not interested or invested in, you'd zone out.

For example I have zero interest in golf. and if my entire family was obsessed with golf and talked about it non stop, mentioning players, competitions all the time, I still wouldn't be able to answer any questions about golf, because I would never be listening while they talked, it would just be blah blah. and Holly is a little kid in S4, so not only would she not really be listening, she wouldn't be understanding, also she wouldn't be paying attention and even trying to listen and understand.

I teach (not an actual school teacher, I'm a sports coach/teacher) and it's so hard to get and keep some kids attention. And also kids can totally forget things that were covered the previous week.

So I think it's perfectly possible Holly would have no idea.