In Discrete Structures, we learned how to use propositional logic to evaluate whether an argument is valid: if the premises are true, does the conclusion logically follow?
P1: The suspect's fingerprints were on the weapon.
P2: The suspect was at the crime scene at the time.
P3: There is no alibi.
∴ Conclusion: The suspect committed the crime.
This is a symbolic structure just like we studied:
P1 ∧ P2 ∧ P3 → Q
If the argument form is a tautology, it is considered logically valid.
✅ So in law, an argument must not only be logically valid, but also persuasive, credible, and backed by real-world evidence.