I thought it was a bit pedantic as well, at first. But looking at Haskell, I can...

		kimolas on Sept 20, 2016 \| parent \| context \| favorite \| on: Is your JavaScript function actually pure? I thought it was a bit pedantic as well, at first. But looking at Haskell, I can see why the author made this point. Haskell functions won't accept random values as input, since they're monadic values.