Daikon is a computer program that looks at other computer programs and tries to figure out what they do. It's like a detective that investigates a crime scene and tries to understand what happened.
However, unlike a detective who looks at clues like footprints and fingerprints, Daikon looks at something called the program's "variables." Variables are like containers that hold information in a program. For example, imagine a program that asks you for your name and then says "Hello, [your name]!" In this program, the variable would be your name.
Daikon looks at all these different variables and tries to understand what they mean and how they relate to each other. It's like a puzzle where you have to figure out how all the pieces fit together. Once Daikon has figured out what the program does, it can help programmers make it better and more efficient.
So, to sum it up, Daikon is a tool that helps detectives--er, programmers--understand what computer programs are doing by looking at the different pieces of information they use and how they interact with each other.