John Muir lived in the 19th century. Yosemite Park has a bit more done to it and learned about it since then. Marconi straddled the 19th and 20th centuries, but claiming that his writings would inform you about wireless telephony as we currently know it is beyond foolish. They were experts in their time, but much has changed since then.

> I find that math articles in particular tend to obfuscate rather than elucidate.

Irony that you wouldn't use simpler English terms in this criticism :)