Almost back to medieval times but not quite.
“When the Supreme Court’s Ohio v. EPA decision blocked Environmental Protection Agency limits on Midwestern states polluting their downwind neighbors, a sad but telling coda came in Justice Neil Gorsuch’s opinion. In five instances, it confused nitrogen oxide, a pollutant that contributes to ozone formation, with nitrous oxide, better known as laughing gas.
You can’t make this stuff up. This repeated mistake in the 5-4 decision exemplifies a high court not just indifferent to facts but contemptuous of them.”
[from Scientific American]