I suspect that What Cobb thinks of as the real world is a dream from beginning to end, and here are a few points of my suspicions
First point
In fact, some hints are given shortly after the beginning of the film, although it is far-fetched but still questionable. In the opening chapter, Cobb sees the children in the dream on the beach, and then is found by Saito's guards and then the camera turns behind them, and it is not too much to say that a palace facing the sea is a palace on a cliff. (Cliffs are exposed rocks that are angled or nearly angled vertically, and are an eroded, weathered terrain.) Cliffs are common on the coast, riverbank, mountainous area, cliffs) And then we pull the camera to the end, Dawn returns home, he asks his son and daughter what they are doing, the son says, "I built a hut on a cliff", which coincides with the opening scene, so can we boldly guess that this child is Cobb's subconscious, Cobb came out of the dream of the mission, but he thinks that real life is actually a dream.
Second point
The second point of doubt is the scene of Cobb talking to the children on the phone at the hotel. It's not that there's something wrong with the scene, it's that there's something wrong with the people. There may be many netizens who missed a person, who should have appeared at the end of the film, but she did not appear. She is Cobb's mother-in-law and the children's grandmother. Supposedly, the children lived with their grandmothers, and if they came home to see the children, they would definitely see Cobb's mother-in-law. This is unavoidable, even if the cheap mother-in-law does not like Cobb and may even hate Cobb, but from the perspective of her taking care of the children alone, she still loves the children. In this way, she should stay and take care of the children until Cobb returns to see their father and son reunited, and then happily leaves with her husband. But no, at the end of the film, we can only see the father-in-law looking at their father and son with satisfaction. So if it's not a movie bug, it should be a bug in his world, and it's very likely that Molly is right.
Third point
Father-in-law logic goes wrong with the words. The father-in-law does not play much in this film, so why say a logical problem in this short scene? Cobb and his father-in-law explained their requirements and the reasons why they could not design dreams, but the father-in-law said that it was time to go back to reality. If the father-in-law means to recognize the reality, Jasmine is dead, then he can say that he recognizes the reality, there is no need to use come back to reality. Will the father-in-law be Cobb's subconscious, representing Cobb's inner doubtful subconscious. "Back to reality, here are all fake dreams" "No, here is the real, the children are still waiting for me, I must go back to take care of the children" If it is Cobb's inner struggle, then this dialogue is easy to understand.
Fourth point
The real point is coming, Cobb's totem. In fact, I have always been a rough guess at this point, and I have never wanted to pass the logic in this. I read it three or four times and still couldn't figure it out, so I went to find some online analysis. Of course the analysis was that Cobb finally woke up, in the real world, and my views were at odds with each other. But it gave me a very important clue, Cobb's totem is the ring. But he has been using the gyroscope to judge whether he is in the dream, is this not a manifestation of self-abandonment? The gyroscope is not his totem, so he can't use the gyroscope to judge whether it is a dream or not, he thinks that the reality is controlled by his subconscious, then he thinks that the rules of this world are what it is, what it is, he thinks that the gyro will fall after a while, then in this real world it will fall. So he could never walk out of this dream. Always think of yourself in the real world.
Fifth point
Cobb and Jasmine were lost in the primitive world of consciousness to study the concept of dreaming in their dreams, and Jasmine was lost, and Cobb was lost, but Cobb was more awake. He knew that the world was fake, and he was going to leave here with Jasmine, so he implanted Doubt into Jasmine. They left one layer, but how many layers of dreams they had, Cobb didn't say, so is it possible that Cobb missed a layer, And Jasmine is right, and they need to leave again.
Sixth point
This is the root of my suspicions, the gyroscope did not fall, and the movie does not show the gyro falling at the end. Will the director be telling the audience that Cobb is still dreaming, still in this real world he thought he was?