LLMs are fundamentally a simplified version of what our brains do. AI will improve by increasing its vocabulary, but the fact is that since human cognition is analog, our brains have infinite vocabularies. The way an LLM works is fundamentally quantizing this process so that it can be digitalized. It turns words (analog) into understanding (for it, digital, for us, still analog subconsciously, if digital in our waking conscious)
Sorry if this is incomprehensible