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Remarkable Twin Connections
00:01:55
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| The studies of twins who are conjoined at the head and share brain activity hasn't been as systematic as one would like, but there's a lot that's known about them. | |
| They're quite rare. | |
| The ones that are probably the best known are Tatiana and Krista Hogan, who are twin girls who live in British Columbia. | |
| And they were born joined at the skull. | |
| And they have what's called a phalamic bridge, which is a bridge of brain tissue that connects the deepest parts of their brains. | |
| So their brains connect. | |
| And they can do some remarkable things. | |
| They can see at least partially through each other's eyes. | |
| They can feel to some extent each other's skin. | |
| There's a video, actually, of their mother sitting with them on a couch, and the girls close their eyes, and the mother will touch one girl's hand, and both girls will say, you're touching the hand. | |
| One girl will say, you're touching my hand. | |
| The other girl says, you're touching my sister's hand. | |
| They share some motor control over each other's limbs. | |
| They can share emotions. | |
| And they seem to share memories to some extent. | |
| But as far as we know, they don't share reason and free will. | |
| First of all, they have different personalities. | |
| They get into fights. | |
| They have different opinions on them. | |
| And they both have to go to school. | |
| Meaning, they both have to study. | |
| It's not like one girl can sit there learning her times tables and the other girl who's attached can just watch TV, but she knows the times tables too. | |
| So again, we see this dichotomy between reason and free will and all the things that the brain does. | |
| And they show that even if you have connected brains, your reason and free will is separate because they have separate souls. | |
| They have brains that are connected. | |
| But they're separate human beings. | |
| They're separate persons and they have separate souls. | |