The Brain in a Vat (thought experiment)

"The Brain in a Vat" thought experiment asks us to imagine a scenario where a person's brain is removed from their body and kept alive in a laboratory, connected to a computer that simulates experiences. If the computer perfectly mimics reality, the person wouldn't know they're just a brain, not in a real world. It raises questions about knowledge, perception, and reality—asking how we can be sure our experiences reflect the true world, or if we're simply experiencing a simulated version created by the computer.