1. I am a bit confused why you would use Hamming distance (which is limited to same-length words) over Levenshtein distance.
2. Antonyms are indeed quite close in concept-space. Both pro-abortion and anti-abortion are concepts about stance regarding abortion, rather than, to borrow Carroll's example, ravens or desks.
Good idea, a couple of small quabbles:
1. I am a bit confused why you would use Hamming distance (which is limited to same-length words) over Levenshtein distance.
2. Antonyms are indeed quite close in concept-space. Both pro-abortion and anti-abortion are concepts about stance regarding abortion, rather than, to borrow Carroll's example, ravens or desks.