The phrase unanswered questions or undeclared questions (Sanskrit avyākṛta, Pali: avyākata - "unfathomable, unexpounded"), in Buddhism, refers to a set of common philosophical questions that Buddha refused to answer, according to Buddhist texts. The Pali texts give only ten, the Sanskrit texts fourteen questions.
According to their subject matter the questions can be grouped in four categories.
1. Is the world eternal?
2. ...or not?
3. ...or both?
4. ...or neither?
(Pali texts omit "both" and "neither")
5. Is the world finite?
6. ...or not?
7. ...or both?
8. ...or neither?
(Pali texts omit "both" and "neither")
9. Is the self identical with the body?
10. ...or is it different from the body?
11. Does the Tathagata (Buddha) exist after death?
12. ...or not?
13. ...or both?
14. ...or neither?
Majjhima Nikaya 63 & 72 in the Pali canon contain a list of ten unanswered questions about certain views (ditthi):