In the play Antigone Teiresias gave an offering to the gods so he could understand the prophecy, but instead of receiving an answer he realized that some slime began to ooze out of the altar. As a result he did not received any answers. In fact, this happened because what Teiresias learn came from his guide, a young boy.
Not sure about sentence 1. number two means when some information is lost when translating a text because it cannot be made into a certain language. its like those videos where they translate something through like 10 languages and some words get lost in the process.