Which one is science and which one is fiction?
Well, if the knaw marks appear to have been made by human teeth (careful observation)...
Also, if the cut marks were made by a sharp blade applied in a striking motion, that might be inconclusive. Blade marks made by apparent "dining" would be more definitive. All this can be determined by expert forensic study (observation) which is really quite good, in 2019....
Precisely, thanks Paul R.
I’ll see your forensic science and raise you unobserved conclusions- what tool/knife type was used? Are we even certain these are human(oid???) bones and how was the age determined? How were the gnaw marks determined to be of the same creature type that the bones were- all unobserved conjectures. As a scientist/engineer, I am very skeptical of that which is concluded on by assumption- I once saw a bridge built with certain assumption....they were wrong, with deadly conclusions; glad it was in a South American country and not ours.