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Today the official killed / missing in action figure for the Ruzzian army has reached half a million. Figures in war tend to be only estimates, but it is still a dam big estimate.
Even if that figure is true -
and maybe especially if that figure is true - then the estimate of 6 or 7 dead Ukrainians for every dead Russian holds some water, as well. Ukraine is simply lost. No two ways about it.
Even if Ukraine won the actual war, Russia wouldn't really lose. There isn't any Ukraine left, except for the name.

Why 6 or 7?... You need to lie much bigger... say 20 or 30. You do not justify anything... so why not?