Evidence that the neutrinos are different?

[unscientific]

We know that there are 3 generations of neutrinos, namely the electron neutrino, muon neutrino and the tau neutrino. The masses are all very small compared to their respective leptons. What evidence is there that these neutrinos of different generations are distinct?

 

[ChrisVer]

https://www.physicsforums.com/threads/neutrino-confusion.809369/

Have a look at my answers here. In particular Post #08