Heard about the split-brain research a bit ago from youtube videos.
The idea is that to treat seizures one procedure is to cut the junction between the left and right brain sharing info. So if one half of the brain is showed one image and the other another, then the patient will answer with one thing, but draw the other, because language is on one hemisphere and motor skills on the other. That's somewhat believable, but what was off is that the patients testimonies for why the did the action.
According to the studies the reasoning for why they drew one thing and said the other is always a rationalization that breaks logical continuity. But this doesn't make sense. You should realize that you made a logical error right away and say with your language brain that you have no idea why. But according to the researchers it's always that the client stops treating things logically. Makes no sense.
So it looks like this study that is one of the basis for explain consciousness might not even be reproducible and might have just been theatrics like a ton of other psychological research done in the mid 20th century.
https://www.consciousentities.com/2017/01/split-brain-not-reproducible/