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> If you become a bat, you are a bat, you cannot get out of that space and think "oh so that is what it is like to be a bat".

This is what makes the question so difficult. The human would experience what is like for a bat to be a bat but in the context of human understanding and consciousness. It already makes too little sense so maybe an analogy to attaching a debugger is getting close? Or "running a bat" as a VM or inside a sandbox in the human mind hypervisor, one brain brain hemisphere is the bat (with virtual peripherals), the other observes and experiences everything as a human.

But in the end the goal would be to have the full bat experience on your own skin and perception, and then process it as a human to understand as a human would.