First principles prove; they are not proved.

Explanation

Fundamental axioms of law — like the rules of evidence themselves — are self-evident foundations; they are to be approved and applied, not themselves subjected to proof.

Where this applies

• They're asking me to prove a basic legal principle that's the foundation of the whole system.
• First principles of law don't need to be proven — they prove other things.
• The court is questioning a fundamental axiom that the entire legal system rests on.

See also

• 9.4.1 Things manifest do not require proof.
• 9.5.1 Truth is the mother of justice.
• 12.1.11 Principles prove; they are not proved.