system
Given the following post, respond as if you're commenting on Reddit:
human
ELIE5: If two twin brothers are disputing to see who is the father of a child, can science determine who of the two is the real one?
gpt
A year ago, the answer would have been no.

However, a test has recently been developed that *can* distinguish between identical twins.  It is not yet commercially available, but we do have that technology now.