>>12812560>it just a conjured illusion in the brainYou can put it that way, but then again, it's not the same to say that it's "all an illusion" than it is to say that it's what the human mind is capable of interpreting based upon sensations it perceives, as filtered through sets of beliefs, premises, and conceptualizations that individuals acquire throughout their life. You should know that there's many conflicting hypotheses, theories, folk beliefs, etc. for stuff in nature (like gravity, planets, diseases, and earthquakes/thunderstorms), but not all of them are the simplest or most coherent possible explanation for them.