I'd have to disagree with this. I don't think it's impossible that if you had a problem in your liver that it could show on a certain place on your tongue with regards to acupuncture meridians. Obviously I'm not saying you can just look at the tongue and solve everything, but I would guess that you can derive some useful information from it.
My lower back was healed from an injury/strain, via working on my feet with acupressure, done by an expert. So sorry, to those of you who only seek out western medicine.
And I've experienced remarkable cures, complete disappearance of symptoms, based upon tongue reading and expert Chinese medicine. I go there first, always.