Answer:
In the US, we have an adversarial legal system. Basically, this comes down to the fact that there are two (or sometimes more) sides that oppose each other, and the court has the position of listening to each side and deciding which is right.
The above is correct, but can be expanded. The adversarial system of law is also known as the Common Law system. this system of law is different to the civil system of law which is from European nations derived from Roman heritage, whereas the Common law system is of British ancestry.
These types of systems should not be confused with the 'common law' which is judge made law from the courts, nor should it be confused with civil law proceedings which is between two people as opposed to criminal law.
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