"The instrument Dr. Watts used looked like a butter knife. He swung it up and down to cut brain tissue. "We put an instrument inside", he said. As Dr. Watts cut, Dr. Freeman asked Rosemary, for example, to recite the Lord's Prayer or sing "God Bless America" or count backwards;... "We tried to estimate thus, how far to further cut, based on how Rosemary responded." When she became incoherent, they ceased cutting."