If for some reasons a brain would be deprived off all inputs, it (he/she) would still have memories to process and all thoughts would be based on past experiences. But in case a person was born without any inputs to hint there is "anything out there", would the mind/brain somehow go on? Would it be aware of time (at least biological rhythms, since it would probably still need sleep), of causality, of self? Now I'm not sure if this is a hypothetical question, or if some data on the subject exists from a real-world observation/research or at least a deduction from our knowledge of how the brain works?

  • $\begingroup$ Note that this question is inviting opinion-based answers. It also needs some clarification with respect to what sensory inputs (eg, proprioception? interoception? nociception? etc) are actually unavailable to the brain. Presumably, a baby with no sense of hunger would quickly die of starvation. $\endgroup$ – Arnon Weinberg Jul 27 at 21:02
  • $\begingroup$ Sure, the question does invite opinion based answers, just as would any other, where little is known on the subject. But there still might be a good answer to this question, and I don't want to "clarify" or add to the question, since that would result in making assumptions of some sort. Also, we can omit the starvation scenario. The brain wouldn't be just tossed on a plate to dry out. It would, of course, be kept in a supporting environment, so that we have a live brain to talk about. $\endgroup$ – marko-36 Jul 28 at 4:45
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    $\begingroup$ I'm afraid opinion-based questions are off-topic on this forum. The brain-in-a-vat concept typically assumes that it would be stimulated with sensory inputs, so without additional details, there would be too many different possible answers. For similar questions that are more answerable, check out: How does a language deprived person think?, and Where would a cognitively separated person get their brain signals excited from?. $\endgroup$ – Arnon Weinberg Jul 28 at 6:38
  • $\begingroup$ Great links. Checking them out. Thanks. $\endgroup$ – marko-36 Jul 28 at 12:04