PULLMAN – As we approach the regular season’s official midpoint there is more confusion than ever following a chaotic weekend that saw half the AP Top 10 fall at the same time for the first time in history and seven previously unbeaten teams go down. Just how overturned is the Pac-12 conference right now? The highest-ranked team, No. 10 Arizona, isn’t even favored at home against USC. But we’ll try and make some sense of it all before Washington State beats Stanford and blows it all up again. 1 Arizona (5-0, 2-0; last week: No. 5) Sure, Rich Rodriguez has done a pretty good job this season. But c’mon, coach, it took you that long to figure out Anu Solomon was your guy at quarterback?