Alright kiddo, so have you ever heard a grown-up say something like "the law is open to interpretation"? Basically, that means that some laws or legal concepts can be understood in different ways, and people might argue about what they really mean.
This is where the indeterminacy debate in legal theory comes in. Some people think that because the law can be interpreted in different ways, it's not really fixed or determinate – meaning it doesn't have a clear meaning that everyone can agree on. They believe that the law is more like a mushy, flexible set of rules that can be shaped to fit different situations.
Other people disagree. They argue that while there might be room for interpretation in some areas of the law, there are also clear rules and principles that can guide us in figuring out what the law actually means. They believe that the law is more determinate and predictable than the first group thinks.
So overall, the indeterminacy debate in legal theory is basically about whether the law is really set in stone, or whether it's more open to different interpretations and flexible enough to adapt to new situations. And like many debates in the grown-up world, there are people on both sides who have different opinions about it!