What does Hypnopaedia teach?

Hypnopaedia is the practice of learning while asleep. It is a controversial topic, with some people claiming that it is effective and others claiming that it is not. There is some scientific evidence to support the claims that hypnopaedia can be effective for learning certain types of information, such as vocabulary and facts. However, there is also evidence to suggest that it is not effective for learning other types of information, such as complex concepts. Overall, the research on hypnopaedia is mixed, and more research is needed to determine its effectiveness.