| This was really well done. I'd just like to point out a few things, as someone who's watched Inception way too many times: 1) It is never said that 3 levels is the maximum depth of a dream until Limbo occurs. My interpretation has always been that Cobb and Ariadne hooked up a shared-dream machine to Fisher's dead body, which brought them into Limbo. 2) Why are there 2 Limbos? There's the one Cobb and Ariadne follow Fisher and Mal into (which has the architecture of the Limbo that Cobb and Mal shared all those years ago). There's then the Limbo that Cobb and Saito share, where it looks like Saito architected the environment (Asian influences). And if they were the same Limbo, why was Cobb washed up on a shore with no memory of how he got there in Saito's Limbo? 3) In the Limbo that Cobb and Mal shared, all they needed to do was kill themselves to wake up. Why then was the defibrillator needed to wake Fisher up from death in Limbo to Dream 3? |
So you're not supposed to worry too much about the logic of the dream levels, since all dreams are basically metaphors for life: mazes where people "get lost" and from which they need to "die to wake up". The only thing that makes limbo special is that it is particularly symbolic. Nolan is presenting a metaphor of life itself as a Penrose staircase, and portraying faith as the way out. When Ariadne shatters the mirrors that trap Cobb in a recursive chain, the image is symbolic: she is a gift from Cobb's father ("ask and ye shall receive") and her role in the film is to guide him out of the maze that is the mortal world. This is presumably why she is the character who accompanies him to immigration.
For more evidence that this is intentional, look at the overwhelming creation imagery and the narrative emphasis on father-son alienation and reconciliation (with Fischer as with Cobb). Look at the curious way Michael Caine seems to be playing God when he shows up in Paris. And then look closely at the ending, which shows us neither a dream nor reality. What Nolan presents is symbolic: we see Cobb's judgment and forgiveness of sins at immigration, and then his reunion with his family in the heavenly garden. The film closes with Cobb ignoring his totem (as a crutch of faithlessness it is no longer needed) and then his son James (who represents faith and like his sister shares an apostolic name) telling him that they are building a castle on a cliff.
A what? That last bit circles back to the opening shot of the children on the beach. It is a bookend reference to Matthew 7.24 and the parable of the wise and foolish builders. The contrast (beach -> cliff) reinforces Cobb's character journey while telling us that the ending is NOT a dream (something reinforced by the lack of the water imagery associated with the other dream levels). It also reinforces the parallels Inception creates between the buildings of limbo and the sandcastles on the beach, and explains why all are ultimately washed away by water just as death washes away life in the Christian parable.
Brilliant movie.