Who decided what is an observable fact?
A reliable source (WP:RS). The encyclopedia is about the citations; it's a travel atlas to the sources about a subject. Any conclusions the encyclopedia draws "itself" are secondary to the sources.
The philosophy department.
What's your point?
A reliable source (WP:RS). The encyclopedia is about the citations; it's a travel atlas to the sources about a subject. Any conclusions the encyclopedia draws "itself" are secondary to the sources.