As a lawyer I've thought a lot about this (and if anyone is working on this and wants to talk get in touch). There are two reasons:
1. Reasoning in law relies on complex language semantics, both in statute and case law. Take for example a court decision that says "in the circumstances of this case I do not agree that John v Doe applies". That can be expressed a million ways and I'm not sure our natural language processing can replace humans yet in this area.
2. There is a lot of copyright problems that need to be overcome. Companies like Lexis and Westlaw own the rights to a lot of decisions and even statutes and can paywall the . This is slowly changing however, for example in the UK recently the courts took back the rights to publish decisions.
1. Reasoning in law relies on complex language semantics, both in statute and case law. Take for example a court decision that says "in the circumstances of this case I do not agree that John v Doe applies". That can be expressed a million ways and I'm not sure our natural language processing can replace humans yet in this area.
2. There is a lot of copyright problems that need to be overcome. Companies like Lexis and Westlaw own the rights to a lot of decisions and even statutes and can paywall the . This is slowly changing however, for example in the UK recently the courts took back the rights to publish decisions.