system: 
User: Do we know more about the bottom of the ocean then the surface of the moon?
ChatGPT: We know less about the bottom of the ocean than the surface of the moon. The ocean floor is much larger than the surface of the moon, and it is also much harder to explore. The depths of the ocean are also much more inhospitable to humans and our equipment, making it difficult to conduct research and take measurements. Despite these challenges, scientists have been able to explore and study the ocean floor using submersibles and remotely operated vehicles, and have made many important discoveries about the ocean and its inhabitants. However, the surface of the moon has been explored by many missions, both manned and unmanned, and we have a much more detailed understanding of its geology, geography, and history.

User: In what quantitative sense do we know more about the surface of the moon than the ocean floor ?
ChatGPT: In a quantitative sense, we know much more about the surface of the moon than the ocean floor. According to NASA, the total surface area of the moon is about 14.6 million square kilometers, and we have mapped nearly 100% of it with high-resolution imagery. In contrast, the total area of the ocean floor is about 361 million square kilometers, and less than 15% of it has been mapped with any significant level of detail. 

The number of missions that have been conducted to explore the surface of the moon is also much higher than the number of missions to explore the ocean floor. NASA alone has conducted six manned missions to the moon, and many more unmanned missions, while the number of manned and unmanned submersibles that have explored the ocean floor is much smaller.

Additionally, the amount of data that has been collected from the surface of the moon is much greater than the amount of data that has been collected from the ocean floor. For example, the Apollo missions alone returned over 842 pounds (382 kg) of lunar samples, and the Lunar Reconnaissance Orbiter has collected over 20 terabytes of data since it began its mission in 2009.

All this to say, we have a much more detailed understanding of the surface of the moon than the ocean floor, including its geology, geography, and history, and the amount of data collected is much larger.