The brain is not some simple input-output device that can be easily replicated by a bunch of wires and chips.
The brain is a complex, dynamic, and adaptive system that constantly changes its structure and function in response to the environment, learning, and experience.
The brain is also composed of billions of neurons and trillions of connections that form intricate networks and circuits that enable cognition, emotion, memory, and consciousness.
To upload the brain, we would need to map every single neuron and connection in the brain, which is far beyond our current technological capabilities.
Even if we could do that, we would need to store the gargantuan amount of data in a computer’s memory, which would require more space than the largest single-memory computer ever built.
And even if we could do that, we would need to translate the data into a code that the computer can understand and use, which would involve solving the hard problem of consciousness and the mind-body problem.
Also, the brain is not a static entity that can be easily copied and pasted into a different medium.
It’s a living organ that constantly interacts with the body and the world. The brain is influenced by hormones, blood flow, metabolism, immune system, sensory input, motor output, and feedback loops that regulate its activity.
The brain is also subject to aging, disease, injury, and death. To upload the brain, we would need to account for all these factors that affect the brain’s functioning and identity.
Even if we could do that, we would need to ensure that the uploaded brain maintains its continuity and coherence with the original brain. Otherwise, we would end up with a different person or no person at all.
Our brain is shaped by its interactions with other brains and with society at large. It’s embedded in a network of relationships, values, norms, beliefs, languages, histories, and meanings that constitute its selfhood and worldview.
To upload the brain, we would need to consider all these aspects that define who we are and how we relate to others.
Even if we could do that, we would need to deal with the implications and consequences of uploading our brains for ourselves and for society.
Would we still be human? Would we still have rights? Would we still have responsibilities? Would we still have a purpose?