The strategy of the Republican spin machinery has been the same for the Op-Ed as it has been to each and every one of the many prior embarrassing, disturbing, even revolting revelations as to the Trump Whitehouse. As would any good product-advertising agency the Republican/conservative public relations experts "brainstormed" the possible strategies, tried out several based on "market research" (using focus groups and by releasing a variety of initial statements and analyzing the public's response), and then pushed ahead with the responses that "sold" the best: glossy, emotionally appealing uses of patriotic memes and mindless superficial notions that make some sort of vague sense - if one didn't think about them too much. These talking points were then widely and frequently repeated by the usual talking heads and in the conservative blogsphere to generate false credence: the impression that these talking points must be the correct perspective because... well, so many people are talking about them.
To bring a dose of reality and logic to the issue, however:
1. "Verification" is a process. It is assembling information and evidence to seek the truth. Something cannot be blandly dismissed as "unverified" during this process of information and evidence gathering as if it was not true. It is being tested to see if it is true. Many times enough evidence and information arise during the verification process to legitimately allow even a skeptic to begin to form opinions and ideas. A true skeptic will remember that their opinions are initial ones, have not been proven and will keep an open mind that later information may prove their initial opinion wrong. But to not even begin to suspect something is true when a substantial number of facts point in that direction is not skepticism; it is naivety. And of course how much verification is required to finally accept something as truth varies based on the point at issue and on the individual examining the evidence.
2. Eyewitness accounts are crucial and legitimate contributors to the process of verification in most of our attempts to discern truth: in our day to day lives, in constructing history, in the criminal justice system, and in journalism. People write or tell us what they saw and we repeatedly use this as an important basis of deciding what actually happened. There are well known problems with eyewitness accounts, so we try to have independent eyewitness accounts and physical evidence for the most important issues, but almost always eyewitness accounts contribute substantially to how we think about virtually all of those many events that we do not observe ourselves.
3. The NY Times editorial is an eyewitness account of events, not an unverified empty claim. Additional eyewitness accounts that share the same or very similar observations have been provided independently and represent additional verifications: they contribute to the total weight of information that supports the picture drawn of the Trump Whitehouse in the Op Ed.
4. I agree that the anonymity of the Op Ed (to the public) is a definite limitation to its weight as evidence. Absolutely! But this is neither unique nor does it allow the information provided to be unthinkingly discarded as untrue. Many facts have been revealed by anonymous revelations. Often people involved in the darkest areas of human endeavor, areas the most important to reveal to the public, seek to protect their identity. The list is very long. We still do not know the identity of Deep Throat. Typically we then ask if there are other pieces of evidence that support the anonymous source. Accounts from other eyewitnesses who are willing to be identified. Information from official sources. Videos. Tweets. Court records. Etc. As far as I can judge these add up to substantially support the account in the Op Ed. Enough to allow me a working hypothesis although they fall short of absolute proof. And my hypothesis is that Trump is indeed who we suspected he was: a very dangerous and ignorant man.