Neanderthals buried their dead true but it is uncertain whether they performed burial rituals. So I would assign a value other than true or false. But it would

Neanderthals buried their dead true but it is uncertain whether they performed burial rituals. So I would assign a value other than true or false. But it would be inline with the data to weight against burial rites by Neanderthals. Humans seem to have been cognitively more flexible than Neanders, with more varied tools, more complex burials and art. Nevertheless, I am curious how they ascertained that Neanderthals could not plan ahead as well as humans. Their definition must be very restrictive because New Caledonian Crows, Chimps, Bonobos, Dolphins, Elephants and possibly even octopuses have been shown to be able to plan ahead.