Presumption of Innocence:The presumption that a person is innocent until proven guilty, which places the burden of proof on the prosecution in a criminal case.
Standard of Proof: The degree of evidence required to establish a claim or support a legal conclusion, such as the 'beyond a reasonable doubt' standard in criminal cases or the 'preponderance of evidence' standard in civil cases.
Affirmative Defense: A defense strategy in which the defendant bears the burden of proving a particular set of facts to avoid or mitigate liability, such as the insanity defense in a criminal trial.