What is the role of memory in inception s narrative structure?

The Wikipedia excerpt describes Inception as a 2010 science fiction film about a thief infiltrating dreams to steal or implant ideas, but it does not discuss how memory functions within the narrative structure. Key elements like dream layers, the protagonist's guilt, or symbolic devices such as totems are not mentioned in the provided evidence. Without explicit details on memory's role, any analysis would require external knowledge not verified here.