I'm confused about the status of this study and the ELO graphs. The post gives some detail about the methods for measuring intelligence, but stops short of des

I'm confused about the status of this study and the ELO graphs. The post gives some detail about the methods for measuring intelligence, but stops short of describing the sample group and calls both IQ 100 and IQ 120 groups "hypothetical". Are those graphs real data, or just descriptive of the authors' current hypothesis?