So can evolution in short lifespan creatures in the lab, and by observing species in the wild, particularly "ring" species that are all alive right now.
Only mutation can be measured.
Yes. And DNA mutations cause changes in offspring. Accumulated changes are "evolution".
Only mutation can be measured. "Evolution", i.e., natural selection, cannot.
Natural selection is one proposed component of evolution, but the two are not synonymous.
In what units is "evolution" measured?