Comment by TeMPOraL

Except it's not what happened, per the article. Instead, they walked down the logits, which is more like asking someone to give 10-20 best guesses for next word, and should one of them match the secret answer, telling them which one is it and asking them to go on with the next word. Seems like a substantially easier task, and most of information is coming from researchers making a choice at every step.