Yes you do. Otherwise, the announcers wouldn't have been in agreement immediately after the play and while watching the replay footage that the touchdown should stand. It took 30 minutes of hunting, zooming, and freeze framing to find one or two frames that make it look likely that the catch wasn't complete -- but that's not the standard. I don't find those frames eliminating "any and all doubt" (and I'm not going to just assume that the reply officials were looking at those two frozen frames from that one magic angle).
Regardless, even if the refs were right on this one -- even if they saw these two frames from this one angle that have convinced some of you that we didn't get screwed here -- we've had a number of situations in the past few years where the roles are reversed, and the ruling on the field stands.
The refs are using a standard with respect to ISU football that differs from the standard required in the rulebook and used in other Big 12 games. That's my point, and the point that a lot of other posters are trying to make. I'm not sure why we can't unite on this one, given the historical evidence.