There is absolute proof in the JFK case. We have absolute proof that the SBT is impossible, i.e., the fact that JFK's tie had no hole through it, that there was only a nick on the outer surface of the tie knot and the nick was not on the edge of the knot, and that photographic evidence proves his tie was centered in the middle of the collar.
We have absolute proof that the autopsy brain photos are not of JFK's brain, i.e., the autopsy skull x-rays show a substantial amount of brain missing from the right half of the brain, but the brain photos show no more than 1-2 ounces of brain tissue missing. We also know that pieces of JFK's brain were splattered onto 16 surfaces, including the windshields of two of the trailing patrolmen and the follow-up car. No rational person can believe that all that brain matter weighed only 2 ounces, especially since the skull x-rays show a large portion of the right brain missing.
We have absolute proof that FMJ ammo did not leave the bullet fragments in JFK's skull that are seen on the autopsy skull x-rays, especially the fragments on the outer table of the skull, which are several inches above the rear head entry wound. Forensic experts universally tell us that FMJ bullets will never shatter into dozens of fragments when they strike bone. One of the leading forensic experts of the 20th and 21st centuries, Dr. Vincent DiMaio, even stated that if an x-ray shows numerous small fragments, this rules out FMJ ammo as the ammo that left the fragments.