The State's witnesses conceded that Panetti was mentally ill, although they resisted the conclusion that Panetti was not competent to be executed. They pointed to the fact that at times Panetti was "clear and lucid", and could understand "certain concepts". Panetti's experts reminded the court that schizophrenia does not diminish a person's cognitive abilities, such that during short interactions the patient may appear lucid. Over time, however, the patient's mental illness would become apparent. Based on this testimony, the Fifth Circuit had held that Panetti's delusions did not render him incompetent. But the Court held that the Fifth Circuit's interpretation of "Ford" had been "flawed".