Two Words That Never Meet

Far apart. The two words never occur together, so no training example ever pairs them and nothing pulls them toward each other.

Each ends up close to the words that surround it — soup, tea, metal — and therefore far from the other, since a word is drawn toward its own neighbours.

Far apart. Their meanings are opposites, and training separates words whose meanings conflict.

Very close together. Every word that has to be predicted from hot also has to be predicted from cold, so the two face an identical prediction problem.