They can be removed.
So you would subject Terri to an operation on her brain so she can have a procedure to check her brain. Interesting. Now, I've been eagerly awaiting your response to the question I put to the forum earlier. I especially want to hear what you have to say about it.
Yes they can. But every single other test she's had, bar none, has shown that she's PVS.
She's been asked to give a clue with her eyes. It's a time honored, classic test. She can't pass it.