Because she wasn’t thinking of infinity as being a list or a set (she wasn’t thinking of cardinal infinities). So any list-based method seemed an illegitimate way of talking about infinity. (oh, and she was certainly willing to believe that the proof was correct—she didn’t think all those mathematicians throughout the ages were wrong! She just didn’t understand it).
Why did Cantor’s diagonalisation not make it make sense to her, or at least show her that whatever was right, her intuition was wrong?
Because she wasn’t thinking of infinity as being a list or a set (she wasn’t thinking of cardinal infinities). So any list-based method seemed an illegitimate way of talking about infinity. (oh, and she was certainly willing to believe that the proof was correct—she didn’t think all those mathematicians throughout the ages were wrong! She just didn’t understand it).