理论
The most elegant theories are useless if they don't correspond to reality.
Economic theory provides the tools, but real-world testing refines them.
The challenge in auction theory is to balance simplicity with strategic sophistication.
Designing markets requires both economic theory and practical intuition.
Evolution is not just a theory; it's a fact written in our genes.
Science is not just about theory; it's about making things that work in the real world.