Like it or not, a photograph is an art form, regardless of subject or style. One of the reasons I can make this generalisation is that as with anything artistic, its not a definitive thing; it means different things to different viewers and is totally subjective. To one viewer it may be crap, to another it may be superb. Just like music, sculpture, painting, the written word or film, it stirs up a different feeling and thought within anyone who looks at a picture. Its not finite like a mathematical formula but totally infinite in its communication.