The principle in Daubert was expanded in "Kumho Tire Co. v. Carmichael" (1999), where the evidence in question was from a technician and not a scientist. The technician was going to testify that the only possible cause of a tire blowout must have been a manufacturing defect, as he could not determine any other possible cause. The Court of Appeal had admitted the evidence on the assumption that Daubert did not apply to technical evidence, only scientific evidence. The Supreme Court reversed, saying that the standard in Daubert could apply to merely technical evidence, but that in this case, the evidence of the proposed expert did not meet the standard.