I have soared by reading the text

The brain in a vat is a hypothesis elaborated by Hilary Putnam in his book "Reason, Truth, and History" in 1981.

A man was operated on by an evil scientist and his brain was removed from his body and placed in a vat of nutrient solution to keep the brain alive.

The nerve endings in the brain are connected to a computer that is programmed to send messages to the brain in order to keep him under the illusion that everything is perfectly normal.

For him, it seems that people, objects, and the sky still exist, and his own movement and bodily sensations can be input.

This brain can also be input or intercept memory.He could even be typed into a code and feel like he was reading something funny and absurd here.

The most basic question about this hypothetical is: How can you guarantee that you are not in this predicament?