This device is amazing. Gotta get one.
I had never thought about this before but the offline generation of keys made me realize a couple things that are interesting. First, 2
256 is an unfathomable number of possibilities which means the likelihood of a duplicate is close to zero. Second, However, there is no safeguard against an actual duplicate even if the possibility is extremely unlikely.
Set me straight if I am wrong. Also, I'm not a skeptic. Here is a video showing how likely it is to have a duplicate:
https://youtu.be/S9JGmA5_unYSteeley