[ryukafalz]

>Hand the same input to the same mind and you'll get a different output every single time, unless the mind willed itself to act rationally.

Are you sure? Remember that memory also counts as an input if it's used in a computation; it seems to me that this applies to both humans and computers.

For a harrowing account of what a mind may do when exposed to very nearly the same inputs, you may be interested in one segment from this Radiolab episode: https://www.wnycstudios.org/story/radiolab-loops

It describes a patient with transient global amnesia who has a looping conversation with her daughter. (There's a link to a video of the conversation on that page as well.) Under normal circumstances this wouldn't happen, as once you've had a conversation you also have memories of having that conversation. But if you're unable to form memories...