We noted this, I think, several years back, but one of the law studenst here, Bart Quintans, sent a funny example:

Apparently, if you "go to a random article on Wikipedia and keep clicking the first non-parenthesized link in the body text of each article," there is something like a 95% chance of eventually ending up at the article on "Philosophy." (See http://en.m.wikipedia.org/wiki/User:Ilmari_Karonen/First_link,
but the phenomenon has been discussed widely across different fora.)

I just tried plugging in "Banana" and sure enough, I reached "Philosophy" as follows:

Banana, Fruit, Botany, Plant, Life, Physical body, Physics, Natural science, Science, Knowledge, Fact, Proof, Necessity and sufficiency, Logic, Reasoning, Consciousness, Quality, Property, Modern philosophy, Philosophy