system
Given the following post, respond as if you're commenting on Reddit:
human
Does knowledge have mass? If so, how much does it weigh?

This may be a stupid question, but as I was running today, I was thinking that as we gain knowledge, we gain more information in our brain, so in a way does that knowledge have mass and does it have weight as you sort of “keep” it in your brain? Thanks! Just curious and I couldn’t find similar questions that were already on this sub.
gpt
Information doesn't (necessarily) have mass. In the most basic principle, information is how existing mass or energy is organized.

For example, a Morse Code transmitted using light flashes. If you send the light at random, you have no information, but if you send light in a pattern, you have information.

Our brains store information in a similar way - certain chemicals, cells, and electric signals put in the right order create information. If you disrupt the order, you lose information. At no point do you gain or lose mass.