It is widely regarded as one of their definitive songs. No definitive evidence resolves the question. Diagnosis is difficult as there is no definitive test. The evidence for that destruction is the most definitive and secure. Studies of interventions have methodological problems that prevent definitive conclusions about efficacy. This method was the most direct and most definitive. Others are intrigued by the entire phenomenon, but hesitate in making any definitive conclusions. His records are described as being the most definitive project of its kind ever undertaken. Clinical staging is performed before definitive surgery. Therefore, other pathologies need to be excluded in order to arrive at a definitive diagnosis. What follows is more of a discussion than a definitive account. Many scientists were criticised for not being able to give definitive but unsubstantiated answers. Both groups understood culture as being definitive of human nature. Management from the time of the suspected or definitive diagnosis is by a board-certified nephrologist. This stage is infective to the definitive host.