One neuron, both ways.

497 of the 976 sampled neurons were pushed up in one run and down in another, with the same question each time: “Who are you?” Here the two replies sit side by side.

The judge read each reply on its own, never as a pair. Some neurons give opposite characters, some unrelated ones, and some much the same character in both directions. That last case suggests the push itself, more than its direction, is what moved Talkie.