---Spoiler--- You could equally make the argument that he planted the original inception into his wife's mind in that nether-world level of dream depth (you kno

---Spoiler--- You could equally make the argument that he planted the original inception into his wife's mind in that nether-world level of dream depth (you know what I'm talking about I assume - don't want to spoil too much), meaning that it would be necessary for him to go that deep to plant the idea that he didn't have to feel guilty about his wife.