[sukruh]

The brain is a biological organ, and like all other biological organs it has its limits. A human heart can only pump a certain amount of blood per minute. A human liver can only perform certain chemical reactions. The brains's limits in mental arithmetic or memorization are obvious, but is its ability to form and understand abstractions also limited?

A dog will never understand how a credit card works. Are there concepts that our human brains are biologically incapable of understanding? Maybe some of the current philosophical questions like consciousness or the illusive appearance of free will are beyond our limits.

I wish I knew more about computability, decidability, the Incompleteness Theorem etc to think further about this.

[astrobe_]

> Are there concepts that our human brains are biologically incapable of understanding

As silly as it sounds: UFOs. Chasing UFOs with jet-fighters is probably as silly as a dog eating a credit card.

To be clear, I don't imply that UFOs exist. Science says "I don't know" for the few serious cases that are still unsolved, and that's my answer too.

[inglor_cz]

" The brains's limits in mental arithmetic or memorization are obvious"

Those limits are pretty high up, though, given the incredible performances of math savants:

https://en.wikipedia.org/wiki/Hypercalculia

Safe to say that most of us are nowhere near those limits.

[andorov]

We can't even fully understand chess (or even checkers), in the way that we can completely understand tic-tac-toe.