There are identical twins out there whose parents confused one with the other and now they living their life with the name of the other sibling, never noticing because it doesn't make any difference.

https://feddit.de/post/2321932

There are identical twins out there whose parents confused one with the other and now they living their life with the name of the other sibling, never noticing because it doesn't make any difference. - Feddit

What I’ve found is that after a week socializing with twins, it’s pretty much impossible to confuse one with the other, especially if they’re older. There’s always some little quirk that differentiates the two. The parents who raised them would have to be out of the world shitty if they can’t tell apart their children.
I could see this happening when they are babies though. Like 6 weeks in Bob becomes Tom and Tom becomes Bob and you might never know. I don’t think that would be harmful at such a young age though.
As long as they don’t have different allergies or had biometrics recorded and assigned to them at the hospital it arguably wouldn’t even matter.
And if one of them do have a bad allergy or disease you should really have a system in place to tell them apart and not rely on just looking at them and hope for the best.