Not exactly. Their studies were based on exact measurements. It may just mean that a forensic anthropologist, specialising in facial recognition, can distinguish the differences between you and a doppelgänger, but your own mother may still do a double-take.

What are the chances of having a doppelgänger?

How likely is it that you actually have a doppelgänger? According to one study, the likelihood of two people sharing the exact facial features is less than 1 in 1 trillion. Put another way, there is only a one in 135 chance that a single pair of doppelgängers exists on our planet of more than 7 billion people.

Is it possible to not have a doppelgänger?

There's definitely a mathematical chance for two doppelgängers to exist, but it's highly unlikely. Mostly people do not come across doppelgangers of themselves. “The human face is extraordinarily unique.