>>firest+MP5
You're assuming that medical science is capable of providing an explanation in every case, when the whole point of this article is to say that these symptoms are insufficient to diagnose SBS. The author is saying if we have no alternative medical explanations, then we have no medical explanation at all. In order to diagnose SBS, the author suggests that you need additional evidence suggesting trauma such as bruising, broken bones, etc. Indeed, that seems to be what the SBS lobby is now saying as well, they just haven't communicated that to front-line providers.