Lanhard's Theorem
From any page in Wikipedia, it will never take more than 5 page-link clicks to access the Wikipedia article on Hitler.
Examples of Lanhard's Theorem:
Donut -> World War II -> Hitler
Antidisestablishmentarianism -> Britain -> World War II -> Hitler
Donut -> World War II -> Hitler
Antidisestablishmentarianism -> Britain -> World War II -> Hitler