In Indian Logic (Nyāya), non-existence is called abhāva. There are various divisions and subdivisions of non-existence. Mutual non-existence” means non-existence due to being different. For instance, a table is different from a chair. In a table, a chair does not exist. This is true for all three phases of time.
Question: I read the article on jñāna on your website and have some questions: What is the difference between self-luminous and self-conscious?
Answer: Self-luminous means an object which does not need the help of another luminous object to see it or perceive it. For example, a burning candle is self-luminous because you do not need another burning candle or light source to see it. However a book or table is not self-luminous because you need a light source to see it.