system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] Is it common knowledge to the public that nightwing was Robin?

Does the public know nightwing is Robin? Like, nightwing and Batman work a lot, and are similar, but have people made the connection between the two?
gpt
It would be theorised, Robin led the Titans then left and someone with similar features and skills called Nightwing came along to lead them while a new younger Robin appeared in Gotham 

There’s also the point the villains they fight would notice immediately and word would spread through that.