The strontium isotope values “more compatible with the Barton-upon-Humber area” establish a geological connection to the local environment.

But strontium signatures from a given geological region can match multiple areas with similar underlying geology.

“More compatible” is not the same as “definitively from.”

The combination of these two data points narrows the possibilities without closing them.

The English Heritage and Historic England researchers are appropriately careful in their language: his chemistry “suggests” connections, the results are “consistent with” certain interpretations, and the overall picture is “a man connected to the wider continental world” rather than “a man who was born in Denmark” or any other specific claim.

This epistemic care is important.