Like the hero of that film, the viewer of “Inception” is adrift in time and experience. We can never even be quite sure what the relationship between dream time and real time is. The hero explains that you can never remember the beginning of a dream, and that dreams that seem to cover hours may only last a short time. Yes, but you don’t know that when you’re dreaming. And what if you’re inside another man’s dream? How does your dream time synch with his? What do you really know?

Cobb also goes to touch base with his father-in-law Miles (Michael Caine), who knows what he does and how he does it. These days Michael Caine need only appear on a screen and we assume he’s wiser than any of the other characters. It’s a gift

Nolan helps us with an emotional thread. The reason Cobb is motivated to risk the dangers of inception is because of grief and guilt involving his wife Mal (Marion Cotillard), and their two children. More I will not (in a way, cannot) say. Cotillard beautifully embodies the wife in an idealized way. Whether we are seeing Cobb’s memories or his dreams is difficult to say–even, literally, in the last shot

“Inception” does a difficult thing. It is wholly original, cut from new cloth, and yet structured with action movie basics so it feels like it makes more sense than (quite possibly) it does.

I thought there was a hole in “Memento:” How does a man with short-term memory loss remember he has short-term memory loss? Maybe there’s a hole in “Inception” too, but I can’t find it. Christopher Nolan reinvented “Batman.” This time he isn’t reinventing anything. Yet few directors will attempt to recycle “Inception.” I think when Nolan left the labyrinth, he threw away the map.

Now comes the place the movie was building toward all of his time. Not a “climax,” nothing really exciting, only an experience that helps explain Sutter’s life up until now, and points toward his future. He takes her along to meet his dad (Kyle Chandler). A lot of the meaning here is in long shots. Sutter says the hell with it. Insults Aimee. What an affecting film this is. It respects its characters and doesn’t use them for its own shabby purposes. How deeply we care about them. Miles Teller and Shailene Woodley are so there. Being young is a solemn business when you really care about someone. Teller has a touch of John Cusack in his “Say Anything” period. Woodley is beautiful in a real person sort if way, studying him with concern, and then that warm smile. We have gone through senior year with these two. We have known them. We have been them.

When they make love the scene is handled perfectly by the director, James Ponsoldt. Neither is a virgin, neither is experienced. They perform the task seriously and with care, Aimee hands Sutter a condom and he puts in on and enters her carefully and they look solemnly into each other’s eyes. None of that wild thrashing about that embarrasses older actors, who doth protest too much.

The movie’s first hour continues on a, I dunno, realistic or naturalistic tone. It makes no point of it. It just looks at these two. They get to enjoy hanging out, and although Sutter says he has no intention of getting serious with Aimee, damned if he doesn’t ask her to the Prom. It’s not even that they fall in love; they just intensely enjoy one another’s company.