On the Absence of Evidence That the Vinland Map Is Medieval

The article, Evidence That the Vinland Map Is Medieval (Anal. Chem. 2003, 75, 6745−6747), is constructed with conjecture and with false logic. It imagines that the ink of the Vinland Map is an iron−gall ink where conclusive evidence shows the ink to be not an iron−gall ink but a carbon-based ink. It asserts that the ink was homogeneous where conclusive evidence shows that it is not. Twenty-nine years ago, the Vinland Map was shown incontrovertibly to be modern. That conclusion stands today.