How do you identify if someone is in PSL?

[everyone]

I've asked two people from my school if there in PSL because how they looked and they looked at me like I'm retarded. Theres a chad at my school but hes like 5,6 and wears crocs so I just know he cant be.
One of them looks like an average incel and the other one legit looks like an alien.

obviously when they look at you like this

 

[nathan]

Joined Today at 9:21 AM

 

[New Poster]

thousand aspie stare

 

[PlayersGetPlayed]

When they use slight incel rhetoric chances are high they're at least aware