Do you believe in chi?
Ah, now there's a question.... The debate is never ending, but in amongst the kerfuffle we seem to forget a fundamental question:
What is chi?
The discussions are usually based on the idea that chi is some kind of Jedi-like mystical force with which to strike down opponents without touching them! (Don't try it at home kids...)
But here's a thought-provoking article and I do suggest you read it regardless of your stance on chi.
There are other articles at that site which I think you'll find interesting.