An interesting article that examines some of the mystery surrounding why people can hallucinate, and the reasons we see what we see.
https://www.quantamagazine.org/a-math-theory-for-why-people-hallucinate-20180730/?fbclid=IwAR1U5uFyCPwk0ZhDw9lEwtziR6xFs1vnbrpXjX0vOdeZ7rQTECcD-f0tfAc
https://www.quantamagazine.org/a-math-theory-for-why-people-hallucinate-20180730/?fbclid=IwAR1U5uFyCPwk0ZhDw9lEwtziR6xFs1vnbrpXjX0vOdeZ7rQTECcD-f0tfAc