Jesse Eisenberg has been studying the work of Kenneth Longergan--which is a smart choice. No script comes within spitting distance of "You Can Count on Me." Lonergan's wonderful story concerns troubled siblings who reunite after years of estrangement. Both siblings have difficulties with boundaries. The tension grows until a rupture occurs; although it's clear that these two people love each other, it's maybe for the best if one lives on Mars, sending letters now and then, keeping a distance. Jesse Eisenberg's new movie doesn't have (a) Kenneth Lonergan's wit, (b) Kenneth Lonergan's understanding of plotting and suspense, (c) Lonergan's eye for detail and his ability to create "organic" shifts in tone, (d) Lonergan's sense of economy, his way of saying only what needs to be said. But why not borrow from the greats? If you're choosing a role model, choose Kenneth Lonergan. The favored Lonergan topic is a pairing of adults who...