We don’t have “proof” by your standard of 90% of what is written about here on FR.
A major figure in politics with demonstrably good sources (and a decades-long close relationship to Trump) became comfortable with his sourcing on it.
Surely that is good enough for posting here with the caveat that I offered. Moreover, it is fitting to the discussion, where the dynamics of Flynn and Flake are also involved.
I do my best to dispute any questionable “information” found here. Many of these stories are planted by Leftists hoping to show FR is a ship of fools. BTaIM the information here is far more truthful than that pushed by the Goebbelsmedia.
Stone is rather erratic and not exactly the most trust-worthy source, either.