Isn't it funny...
how two intelligent, experienced, educated, thoughtful, well-informed people can look at the same data and arrive at very different conclusions?
You do realize, that leaves only two alternatives. One of them is mistaken, or both are mistaken.
Then again, there may be a third possibility. They are both correct, but they are using different language to describe the same phenomenon.
There is no a priori way to decide among these alternatives. But realizing that they exist at all is the beginning of wisdom.