Nothing
I don't think that Ralph deliberately lies. I think that Ralph is so traumatised by what he experienced that he finds it difficult to come to terms with it. Ralph does actually say to Piggy things such as you didn't see what they did and it was murder, so he isn't denying what happened, he just doesn't want to relive the experience by discussing it with Samneric and apparently they feel the same way.
Early in the novel Ralph, Jack and Simon climb the mountain to ascertain if they are actually on an island. Later in the book Ralph, Jack and Roger climb the mountain in search of the beast.
Jack came back from an unsuccessful day of hunting and fought with Ralph over the priorities on the island, ans Simon ran off.
What does Simon say to Ralph that makes them both smile? Think carefully about Simon‟s choice of words do you think it foreshadows something that might happen later in the novel?
he predicts that SImon will reach or he shall return home safely. Simon says, "You'll get back all right." (Chapter 7) Ralph's reaction is unsure and uncomfortable.
it was Simon.
Simon helps Ralph build shelters in Chapter 3 of "Lord of the Flies."
Jack finds Ralph and Simon building shelters when he returns from the hunts.
Simon tells Ralph that he will get home safely in "Lord of the Flies." Simon has a mystical and intuitive connection with the island and its surroundings, allowing him to offer comfort and reassurance to Ralph.
In chapter 9 of "Lord of the Flies," Ralph and Piggy disclaim their parts in Simon's death by suggesting that they didn't participate in the killing intentionally and by arguing that they were caught up in the frenzy of the moment. They claim that they were swept away by the group's madness and didn't mean for Simon to be harmed, shifting the blame to the collective actions of the group.
Ralph takes Simon and Jack along with him on the expedition.