if russia says A, we can assume !A due to russia's history of dishonesty, literally with no other information necessary

someone else being dishonest, even if true, doesn't make russia more honest, so we can still assume !A

indeed, because russia's history of dishonesty is so long and strong, we can stop right there, unless russia proves its probable lies are actually truthful (such is the fate of a liar)

if they don't like it, they can start being honest and keep it up for a few decades to show they've changed