Indeed, in fact in most situations it's impossible to be both an ordinary individual and be in an ordinary group.
Hypothetically, let's imagine there were 10 normal-sized planets with 10 people each, and 1 big planet with 1 million. In this scenario everyone is either on a strange (big) planet, or they are on a normal planet but they are not typical individuals, because over 99% live on the big planet.
I see what you're trying to do, but it doesn't work. Our arguments need to be like the Doomsday argument, presented here: https://what-if.xkcd.com/65/
If most species looked at themselves and said "my species is ordinary" the majority of them would be right; however, it doesn't give you any statistical reason to think that humans are ordinary.
According the reasoning here it's the second one that's wrong (or rather, unlikely).
btw fergussimpson your posts are showing up dead but then are getting undeaded after a certain period of time I guess. Your first post here was dead for a while and now it isn't. Your reply to this parent is dead as of writing this post. I guess it's because you have a new account - I wasn't aware we were auto-hellbanning people now, though. How annoying.
I Am Not A Necromancer, but I believe the process involves some sort of blood sacrifice and, in some cultures, a certain amount of chanting. Dancing may also be involved, or at the very least the rattling of bone talismans.
Hypothetically, let's imagine there were 10 normal-sized planets with 10 people each, and 1 big planet with 1 million. In this scenario everyone is either on a strange (big) planet, or they are on a normal planet but they are not typical individuals, because over 99% live on the big planet.