What knowledge did the Oracle forbid to the people of Yonada? At the beginning, we see it it kill the old man for saying he was on a space ship. Yet Natira talks about arriving at the New World of the Promise “soon”. There are no lines to indicate that this is knowledge only allowed to the High Priestess and her husband. The Oracle doesn’t make an issue of the fact that Kirk, Spock, and McCoy are from space. So it’s fine to admit space exists and it may contain aliens. It’s fine for those aliens to talk around the asteroid ship. They’re from outside, so they’ll know Yonada is ship. That’s fine with the Oracle. You can go right up to the line, but you can’t say aloud that Yonada is a ship. This seemed like such a fine line in show. We see the Oracle painfully kill the old man. Some emergency workers come and remove the body. Less than five minutes later they’re having a drink and toasting to the people of Yonada. They don’t address why the Oracle killed the man but considers Kirk’s party to be honored guests. I wonder how all this is handled in education. The people of Yonada had taken to living underground before the exodus. So maybe they’re comfortable spending most of their time underground. Natira says she sees the stars at night, but maybe that’s rare because people learned to avoid the surface because the environmental changes due to the dying sun. Maybe the Oracle has them downplay geography in school curricula, so kids don’t want to see the other side of the world. I wonder how many underground cities there are how big their population is. The smaller it is, the harder it would be for the Oracle to maintain the illusion they lived on a world.