Of course, &quot;just splice again&quot;. Why not. We can always take one of the original eggs, undo the modification, and put it back in the womb of the now 70-year old mother. And kill the 30-year old defective daughter, while you&#x27;re at it.<p>I do hope that is not what you meant with your comment though. I prefer not to think of fellow human beings as living petri dishes, so I don&#x27;t consider field-patching an acceptable solution when discussing genetic manipulation.