Ireland unlikely to beat the odds this time against Black Ferns

New Zealand's Jorja Miller celebrates. Pic: Ben Birchall/PA Wire
There is a scenario this Sunday whereby Ireland would leap three places up the world rankings and into second spot.
How likely is that? A million to one. New Zealand would have to be beaten with 15 points to spare, Canada would need to lose by a similar margin to Scotland, and South Africa would have to take care of the French.