Inception2010

When Cobb spins the top to find out if he is dreaming and ignores it to see his kids, it isn’t to give some twist that “maybe he’s still in the dream Ooh!” It shows that he has let go of his obsession with finding out what is reality and if he is awake. The idea that he implanted in Mal’s mind became his own inception, but by letting her go and embracing his children, he rejects the idea and asserts that this is reality. Whether it actually is or not is entirely inconsequential.