Oscar Pistorius first gained international fame amid a raging debate over whether prosthetic blades would give him unfair advantage against able-bodied athletes. Today, the track star finds himself in the middle of a more serious controversy: whether he intentionally shot and killed his girlfriend Reeva Steenkamp. Both cases raise serious questions regarding humanity. Gabriella Håkansson* embarks on the slippery-slop of what defines the human.