I actually had no idea that he had had polio, and had a partially disabled right hand. I feel stupid for not having known that, but it certainly says something about his abilities. He'll be missed.
If anybody knows how to spell "knives," it's Jacob. Surely it's a coincidence than the "F" key and the "V" key are so close together on a QWERTY keyboard. Jacob also knifes Dusty out of frustration over his typo-pointing-outed-ness.