No, this is patently false. Here are some examples which illustrate Silhouette's point:

https://en.wikipedia.org/wiki/Content_delivery_network

https://www.loc.gov/standards/mdc/

https://en.wikipedia.org/wiki/Portal:Featured_content

https://en.wikipedia.org/wiki/Information_content

The phrase “Table of Contents” refers to the content of a written work. That certainly wasn’t invented for SEO.