> Why would you need more than 5? because humans are quite diverse > Is it really plausible that a theoretical person born blind and sighted later in fact ca

> Why would you need more than 5? because humans are quite diverse > Is it really plausible that a theoretical person born blind and sighted later in fact can distinguish between the two but we just happened to get unlucky to find the five dunces in the world who can't? We don't know which percentage of blind people can distinguish objects by sight once they start to see. We don't know if it's all-or-nothing or not. If half of blinds can, there's still a 3% chance to get the published results from five subjects. If it's 30%, the chances grow to 17%.