Alright:
A lie is defined as "any deliberate deception", an error in facts is not a lie, it is an error, to call it a lie is a personal attack.
Charity....
You are arguing "facts not in evidence." If he retracts the error and admits it was such, than I will do likewise with my assertion. But given the context of the discussion, I believe it more likely that he pulled numbers out of his head to defame the Russian people.