This paragraph is not inert. You should be able to select the text content, search for it using in-browser search features, and focus and click the link. There is a click event handler set on the paragraph that changes the border color for a second when it is clicked anywhere. This sentence has contenteditable set on it, so it is editable.

This paragraph is inert. You won't be able to select the text content, search for it using in-browser search features, focus and click the link, or issue click events on it (the border color won't change when it is clicked). This sentence has contenteditable set on it, but it is not editable because it is inert.