Intelligence is the ability of a system to adapt to its environment and achieve goals through efficient information processing, learning, and decision-making.
per GPT: Intelligence is closely tied to the environment. In simple, predictable settings, optimal intelligence can be basic and energy-efficient. In complex, ever-changing environments, intelligence needs to be more flexible but uses more energy. To create a superintelligence—something far smarter than humans—we'd need an environment that's complex, rich in information, and stable over the development cycle, with plenty of resources and quick feedback on actions. This environment would challenge the entity to continuously adapt and learn, setting the stage for the development of advanced intelligence.