Verifiable & Validated

G. K. Chesterton <http://webcache.googleusercontent.com/G._K._Chesterton>  once noted that "Certain new theologians dispute original sin, which is the only part of Christian theology which can really be proved," (Orthodoxy, chap. 2). He saw original sin as the one Christian doctrine that is empirically verifiable and validated by 3500 years of human history.