IN MY OPINION.
I consider "giving" a game away: coughing up turnovers (fumbles,interceptions), dropping passes, penalties (especially bonehead ones) and uncharacteristically poor play. It's the same definition that you apply when NU loses. Look around these boards, you'll see that NU never gets beaten, they GIVE it away.
Yeah, I know, ISU always plays bad! But when they play at LINCOLN they play worse!
Again, like you folks, I can only opine. The games haven't been played yet.
BTW, history is wonderful. But it doesn't win games. Ask PITT, 15-6-3 against NU. You have a long way to go to even that series. ISU is 2 for 3 in the last three years vs NU. You need this one to even it out. Sadly, college athletics is about "what have you done for me lately".