The mouseover text on today’s xkcd says that if you click on the first link in any Wikipedia article that is not in italics or parentheses enough times you will get to the page for “Philosophy”.
So I tried it. I first clicked on the “Random Page” link. Here’s what happened next:
Bhattakufer
Shimla
Renaming of cities in India
British Empire
Dominion
Autonomy
Concept
Cognition
Thought
Consciousness
Panpsychism
Philosophy
So, that’s ten steps between my randomly generated page and the Philosophy page. Not bad.
nrclark 
I keep trying this. I recently found that Physics was a closed loop that didn’t include philosophy, but usually it works in under 20 steps (and I imagine someone will intentionally tweak the physics loop at some point… someone).
Michael DeLorenzo
United States
Federalism
Politics
Group decision making
Individual
Person
Human
Extant taxon
Biology
Science
Knowledge
Fact
Information
Sequence
Mathematics
Quantity
Property (philosophy)
Modern philosophy
Philosophy
Exactly 20 steps from Michael DeLorenzo. And of course, having someone associated with film and television come up at random for the first step suggests an obvious experiment:
Kevin Bacon
Golden Globe Award
Hollywood Foreign Press Association
Organization
Social group
Social sciences
List of academic disciplines
Academia
Community
Living
Life
Objects
Physics (uh oh)
Natural Science
Science
Knowledge
Fact
Information
Sequence
Mathematics
Quantity
Property (philosophy)
Modern philosophy
Philosophy
23 steps, if I count correctly