" Personally I don't believe this, because in the book (Prince Caspian) they remember certain events and relay back to them when looking over their old possessions in their chests when they get into the secret passage. Lucy and Edmund are also referenced in VDT (at the beginning) that they pretend like they're "once again in Narnia," having old adventures, which Lewis explains that Eustace thinks is childish and moronic."
Truman, once they were back in Narnia, they could remember their Narnian memories. That was how they knew how to fight with swords and shoot arrows so well when proving to Trumpkin that they were who they said they were.
Even when they were back on Earth, they could remember their experiences if they made a conscious effort to do so. The Professor in the books even cautions them not to talk too much about it, a possible note to live in their own world and not try to keep living in Narnia.
"If you had been paying attention you would've noticed that Peter, theoretically, never started that fight. Sure he hit him, but think about the low-belt insult issued by the other. Not too much to ask for, is it?"
It also isn't too much to walk away when not issued an apology. Is beating an apology out of someone really the correct etiquette. Heck, when I bump into someone, even if they were the ones mainly at fault, I will apologize out of common decency. If they rise it to the next leel, I walk away. If someone starts a fight over not being given an apology, I do call that person a rabble rouser.
"And yet, everyone else was supposed to act like they did before? I stand by my guns: their maturity was never retained. They remained children with child minds who acted just as they did before they ever entered the wardrobe."
No. They were supposed to act better than they did before they left the wardrobe. Edmund maintained his maturity. And as for the difference in level of importance being High King, not everything had to cross Peter's desk. Edmund and Lucy went to battle without Peter's knowledge as Peter was in Ettinsmoor in battle at the time. Lucy was in charge of Narnia (any troubles came by her--in fact, she was probably the one who first heard about the attack on Anvard and got the forces ready. They each had their own major responsibilities as kings and queens.
In fact, you make my point when you stated "Lucy is a little girl. What is she going to do? What power does she have, exactly, when it comes to making decisions in the family?" She went from queen, known as the Valiant, who fought in battles and helped to rule an entire country and keep the peace to a little girl who had no say in anything anymore. If she could remember everything, she would have been a seriously messed up child and the brattiest one. Edmund would have reverted to his old ways as well if he could have remembered everything always and had to go back to the preteen child.
Imagine if any of them had been romatically involved with anyone there and had gone al the way. That would also seriously impact their innocent minds after coming back and remembering it.
You are seriously downplaying the other three siblings in regards to their responsibilities in Narnia and the traumatic impact it would have caused had they remembered their experiences they way you suggest Peter did.
"See, that doesn't add up. Why should Susan abandon her belief in Narnia while no one else did? That's the real question, but I think I know what really happened: maturity. The point Lewis was making was that Susan did grow and mature, only it was worldly maturity, not spritual. He then implied that worldy maturity was in fact immature by that definition."
No Truman, it wasn't maturity that was her problem, it was her dismissal of other imprtant factors. A Polly said about Susan, "She wasted all her school time wanting to be the age she is now, and she'll waste the rest of her life trying to be that age." This tells me that she was not being mature, but immature. She allowed her vanity and social life to take over everything else, including her school work and possibly her family and spiritual life as well.
I agree that her abandonment of Narnia was sudden and shocking, but the reason is not maturity. Digory and Polly matured, even if they never did get married, and never lost faith in Narnia or Aslan. So what do you mean by maturity?
MrBob