"We don't know exactly what the state of her mind is"
Do you think she should to be taken off food and water for weeks to die even if you are right and no one knows exactly what the state of her mind is? What if she is aware of being starved to death, and what if she is aware that she is thirsty and desperately wants water? Would you want to be in her situation?
"Do you think she should to be taken off food and water for weeks to die even if you are right and no one knows exactly what the state of her mind is?"
Similarly, how long do you keep going?