You know what, officials can go suck a fat one.
Seriously...they decided to review that Purdue TD (which probably wasn't) and didn't reverse it. Yet they did not try to review the Wisconsin TD (that also probably wasn't), and they offered no review of a possible Purdue TD (that probably could have been).
What a bunch of selective BS. Humans suck at this. Use replay and a master official in a sky booth.
Also, that roughing the passer on Purdue call earlier in the game was damn joke. That crap is totally out of hand this year, especially in the NFL