system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Does the size of a brain in any given species always determine intelligence?
gpt
Intelligence has a direct correlation to the size of an animals brain when compared to the size of the animal.

For instance, we humans have very large brains for our bodies.  That means that we have extra processing power beyond what is required for basic motor function.  Many birds also have large brains.  They can solve problems and simple box puzzles to get food.

Dogs on the other hand have proportionally smaller brains than birds or humans.  They can recognize commands that they are taught through repetition, but typically cannot solve problems on their own.