Oh hell no. We’re not doing that.
You can choose to accept the comment, or not, based on the information given. If person A does not want to provide additional information, then that is their choice, and person B is free to weigh their comments based on how that choice affects their view of person A’s comment.
But we’re not going to start down a road of “papers please” before we accept what people say. You want to find references to refute what was said, go for it. Because in the end those references, and personal experience, are all we have - claims by an poster here can’t be verified, nor should they have to be.
Thanks.