Not in any way directly answering your question I would quickly add:
It is a question of the gradation of being.
Certain sophists think that existence is an illusion, that each being is an absolute illusion which has no existence, in other words, that the existence of beings is like a mirage, or like the reflection of an image in water or in a mirror, which is only an appearance having in itself no principle, foundation or reality.
This theory is erroneous, for though the existence of internal beings in relation to the existence of exterior reality is an illusion, in the condition of being, it has a real and certain existence.
For example, the existence of the mineral in comparison with that of man is nonexistence, for when man is apparently annihilated, his body becomes mineral; however, the mineral has existence in the mineral world. Therefore, it is evident that earth, in relation to the existence of man, is nonexistent, and its existence is illusory; however in relation to the mineral it exists.
In the same manner the existence of internal beings in comparison with the existence of external reality is but illusion and nothingness; it is an appearance, like the image reflected in a mirror. However though an image which is seen in a mirror is an illusion, the source and the reality of that illusory image is the person reflected, whose face appears in the mirror. Briefly, the reflection in relation to the person reflected is an illusion.
Then it is evident that although internal beings in relation to the existence of external reality have no existence, but are like the mirage or the reflections in the mirror, yet in their own degree they exist.
This is why those who are heedless and deny external reality, and claim it to be merely ‘abstraction’ are said by certain entities to be dead.