Comments on the article by M. J. Roy et al (see record 1998-11685-001) which addressed the question of whether Gulf War Syndrome is a distinct disorder caused by toxic exposure. The authors consider this research to be a useful corrective against the possibly overinclusive subsuming within the Gulf War rubric of all psychiatric symptomatology that arises in its veterans. However, one study cannot make a conclusive case against the possibility of this syndrome, especially given the state of the evidence and the inherent methodological complexity of the question.