How does the author use foreshadowing in The Physicists?

The Inspector and the Doktor have a disagreement about the ideal treatment for the
murdering madmen. The Inspector wishes to punish them with jail, while the Doktor
feels they are not responsible for their actions. In fact, the Doktor foreshadows Act II's discussion of the proper place of science and the duty of the scientist when she points to scientific and medical advances in the treatment of the mentally ill as the reason to not jail the men. The Doktor claims newest medicines can make even the most violent madmen "gentle as lambs."