It is often stated that QED makes predictions correct up to many decimal places.
What are the experiments that show this? And all have to provide measurements up to 12 decimal places?
To my understanding you need at least two experiments with that precision, because first you need to determine the fine-structure constant and only then you can plug it in into the formula for predictions?
And technically, it would only show consistency between those two experiments with QED, but does not exclude that measuring another property is not predicted by QED?