They did not say that Cheddar Man definitely had dark skin and blue eyes.

They said that the genetic evidence most strongly supported those characteristics.

The probability was high enough to be informative and to inform the facial reconstruction, but it was not certainty.

There is also a deeper limit to what genetic pigmentation prediction can tell us: the relationship between specific genetic variants and physical appearance is established in modern populations, and those populations have genetic backgrounds that may differ in subtle ways from a ten-thousand-year-old individual.

The variants we identify as associated with dark or light skin in modern humans may have had slightly different effects in the context of ancient genomes that differed in other ways.