For centuries it was thought that the frontal part of the human brain handled vision (simply because it is near the eyes). Today we know that this part does not handle vision. The part that handles vision turned out to be at the rear of the brain (see image). The front part of the brain is called the prefrontal vortex and is responsible for concocting lies. Pathological liars have more prefrontal white matter:
"Liars showed a relatively widespread increase in white matter (23-36%) in orbitofrontal, middle and inferior, but not superior, frontal gyri compared with antisocial and normal controls. This white matter increase may predispose some individuals to pathological lying."
Yang Y, Raine A, Narr KL, Lencz T, LaCasse L, Colletti P, Toga AW. Localisation of increased prefrontal white matter in pathological liars. Br J Psychiatry. 2007 Feb;190:174-5. PubMed PMID: 17267937.
Pathological liars have more white matter at the prefrontal vortex where lies are concocted.
[Quran 96.16] A lying sinful forehead.
The Quran says that disbelievers will be dragged from their lying forehead which turned out to be the part where lies are concocted.
How could an illiterate man who lived 1400 years ago have known that the frontal part of the brain handles lies?
(Contrary to reality, the Christian Bible claims that there are four legged insects Leviticus 11:20. It also claims that there is an animal that has "flames stream from its mouth; sparks of fire shoot out. Smoke pours from its nostrils as from a boiling pot over burning reeds. Its breath sets coals ablaze, and flames dart from its mouth". Job 41:19-21)