I think if you’re a GenX or a Millenial the height thing relative to the grandparents is mostly true. And if you’re complaining about how tiny grandpa’s house

I think if you’re a GenX or a Millenial the height thing relative to the grandparents is mostly true. And if you’re complaining about how tiny grandpa’s house was compared to today, you’re probably outing yourself as being born in the last century. So it’s a relatively safe bet GP made.