My conclusion so far is that our sensory systems are willing to be deluded, if we supply them with sufficient high quality information. Interestingly enough, sometime earlier I had read about an exactly equivalent phenomenon with the visual system, which may make it easier to get a handle on things ...
What they were doing was to develop a very high quality movie projection system, in the belief that it would attract more patrons -- similar concept to IMax but more advanced. They did research, and found that removing flicker between frames was crucial, the frame rate was upped dramatically and the resolution and screen size increased.
One big problem. They got the technology working, early 70's I think, made a exciting test film of a car racing down a mountain road and tried it on a test audience. And disaster! The people watching could not stop their system and bodies reacting to what was happening on the screen as if it were real, I can't recall the exact details, but something along the lines of heart attacks, vomiting, fainting, you name it. And that was the end of the technology, shelved indefinitely, I guess ...
The assessment by the doctors was that no matter how certain people were in their heads that what they were watching was not real, the quality of the presentation was enough for the eye/brain to cross a threshhold and say to the physical self, This Is The Real Thing!