Answer:
14. God and the other.
15. Orient Express
Step-by-step explanation:
In this story, Adam believes that "God and the other" do not exist. He states, quite succintly, that the existence of God and the other cannot be demonstrated. From this, he derives that what cannot be demonstrated cannot exist.
In this sentence, the phrase that should be italicized is Orient Express. This is because the phrase is the proper name of a particular train line.