Legal Literacy - This article explains the important role of logic and sound legal argumentation in writing a legal opinion.

In public discourse and legal practice in Indonesia, the role of logic and legal argumentation in legal studies is increasingly becoming an urgency. To become a reliable lawyer, judge, prosecutor, or legal practitioner, one must have an understanding of logic, legal reasoning, and legal argumentation. Because these are absolute requirements that cannot be eliminated, they must be related to one another. Logic, legal reasoning, and legal argumentation equip law students, legal workers, and practitioners of law with the ability to think critically and argumentatively in understanding legal principles, assumptions, rules, propositions, and practices.

This also reinforces the importance of law graduates being able to comprehensively understand and know what is meant by logic and legal argumentation. Law students are often required to think like a lawyer, “to think like a lawyer”. As a student, it is hoped that they will be able to analyze legal cases through logic and legal reasoning in legal cases, both in the scope of public law, academics, and the courts.

Logic as a term means a method for assessing the accuracy and order of reasoning used to convey an argument. Meanwhile, argumentation theory is a way to examine how to analyze and formulate an argument quickly, clearly and rationally through the development of juridical criteria and universal criteria which are used as the basis for rationality in constructing legal arguments. A legal argument that is not supported by logic means that the solution to the legal problem is not based on a clear opinion.

Legal logic based on case law is an inductive way of thinking and the deductive way of thinking is by using laws, but this opinion is not entirely correct. Inductive logic in legal practice occurs in the courts, namely formulating facts, then looking for cause-and-effect relationships and determining probabilities, where this step is limited by the legal principle of evidence, while deductive logic in legal practice begins with legal rules where the state of legal rules is often found as follows:

1. Legal vacuum.
2. Conflict of legal norms.
3. Vague legal norms.