This essay is ridiculous, it's arguing against a concept that nobody with the minutest understanding or interest in the brain has. He's arguing that because you cannot go find the picture of a dollar bill in any single neuron, that means the brain is not storing the "representation" of a dollar bill.

I am the first to argue the brain is more than just a plain neural network, it's highly diversified and works in ways beyond our understanding yet, but this is just silly. The brain obviously stores the understanding of a dollar bill in the pattern and sets of neurons (like a neural network). The brain quite obviously has to store the representation of a dollar bill, and we probably will find a way to isolate this in a brain in the next 100 years. It's just that, like a neural network, information is stored in complex multi-layered systems rather than traditional computing where a specific bit of memory is stored in a specific address.

Author is half arguing a point absolutely nobody makes, and half arguing that "human brains are super duper special and can never be represented by machinery because magic". Which is a very tired philosophical argument. Human brains are amazing and continue to exceed our understanding, but they are just shifting information around in patterns, and that's a simple physical process.