> Picture an LLM as a stack of books. Each book is a layer of basic computational units known as neurons, with each neuron in one layer passing information to the neurons in the layers above. The books at the bottom of the stack are the input layers, which process the text coming into the model. The books at the top are the output layers, which prepare the text that the model is about to produce.

How about instead we picture an LLM as a stack of pancakes? This would have been an equally useful analogy, because the author doesn’t even use any relatable features of a book.

Maybe we've just been using books wrong the entire time.