Answer:
1. The repetition supports and emphasizes that he was really planning to lie. It shows that this plan was clear to him at first, and that he didn't question it until he was reassured by the Controller. Basically, the plan was concrete in his mind until the Controller changed that.
2. The semicolon shows the link between the two concepts whilst still separating them to highlight the differentiation of them. In other words, the semicolon shows how the ideas are connected yet separate.
Step-by-step explanation: