In "QED" Feynman states that the predictions are as precise as being able to measure the distance between (points in) New York and Los Angeles accurately to within the width of a human hair.
https://en.wikipedia.org/wiki/QED:_The_Strange_Theory_of_Lig...
[1]: https://en.wikipedia.org/wiki/Neutrino_oscillation
In "QED" Feynman states that the predictions are as precise as being able to measure the distance between (points in) New York and Los Angeles accurately to within the width of a human hair.
https://en.wikipedia.org/wiki/QED:_The_Strange_Theory_of_Lig...