Far be it from me to ever speak ill of Tina Fey. Or Paul Rudd. And definitely not Tina Fey and Paul Rudd (and Wallace Shawn!). But I just have to be honest: the plot of “Admission” looks really stupid. Fey plays an admissions counselor at Princeton and Rudd plays a sensitive single dad who runs a high school for troubled kids … and they fall in love … but Rudd just so happens to have a student he thinks is a child Fey gave up for adoption many years ago. Huh? This sounds as convoluted as an episode of “Gossip Girl.” But whatever. I will see it. Tina Fey and Paul Rudd!