That is too far fetched for me, that makes everyone God. And it would require shared data using some unknown link. Think about this, two scientists on opposite sides of the world, unknown to each other, discover or invent the same thing. This is a write up on this. If your mind created everything then why would they come up with essentially the same thing ? In fact lets go one step further. If your reality is different from my reality for example the interpretation colour red. Why is it that if a test is offered, a vast majority of people will understand the red presented in the test. Remember the test would be created in the reality of the test giver. If you look at the tree question the internal and external reality makes more sense than the illusion one. When the tree falls vibrations are produced. If you want to get technical you can say if no human is around then no sound is produced. Since sound is the word we ascribe to the interpretation of that specific vibration. But vibrations are produced. The event happened whether we are there or not and the vibrations are produced. The external reality happened, we were just not present to interpret it with our internal reality. Quite frankly to me the illusion theory is a muddled mess, it requires too much complication and leaves too many unknowns.