A tell-tale sign that someone is a clone is a similar origin story. Take Squid Game actor Heo Sung-tae, who before acting entered a talent show contest and came fifth. This is very much like his progenitor Diana Dors, an actor who came third in a beauty contest. Add that to the fact that both Dors and Sung-tae are born three days apart in October and you have conclusive proof of their clone connection!