Knives of frozen feces don’t make the cut, disproving well-known legend (2019)

Just based on the historical accounts mentioned, it seems more likely that the tools described/used were actually feces knife that have a layer of ice on the outside- which could arguably cut without having the melted skid marks problem described by the anthropologist. If this were mythbusters, I'd call this experiment inconclusive.

Right. But he didn't have the fish and baby seal diet for 2 weeks before pooping, and he didn't freeze it at -50˙C you get above the Arctic Circle. (Common freezers only go at -30˙C). So that refutation is inconclusive, and the experiment needs replication with the right parameters, I would say...