1 – Terminology. 2 – The Standard of Proof under Substantive Law. 2.1 – Standard of Proof in Civil Law. 2.1.1 – Reasonable Degree of Conviction. 2.1.2 – Modifications. 2.2 – Standard of Proof in Common Law. 2.2.1 – Balance of Probabilities. 2.2.2 – Modifications. 2.3 – Challenges of Comparing Different Standards of Proof. 3 – Transnational Standard of Proof. 3.1 – Balance of Probabilities. 3.2 – Modifications. 3.3 – Practical Considerations. 4 – Conclusion.