Talk about a case of self incrimination.
How I would answer:
Yes, I could and would not only gouge out an eye of someone intent on commiting rape or bodily harm (either to myself or another) but I would also cut off the testicles of said person and stuff them in the newly vacant eye sockets.
As for how I know I have the fortitude and capacity to commit such violence, I can only submit as evidence two things. One, I have previously set certain absolute values which I live by. One such value is that a person intent on killing me has lost all his or her worth as a human being, and has become nothing more than vermin to be disposed of. Secondly, as many of my friends can attest, I was always the one who could and would shoot the family dog when it got too old or enjoy a day of killing rodents. When something needs to be killed, I do it.
And of course, the next thing you know your "paper" has been forwarded to the FBI, PETA, and the local PD.