(law) Court testimony from a person involved in a criminal activity case, implicating other people in crimes, usually given in exchange for leniency from the prosecutor.

(law) In a legal forum, testimony which is from an under-oath witness who is reciting an out-of-court statement, the content of which is being offered to prove the truth of the matter asserted.

(law) Evidence that relies on an inference to connect it to a conclusion of fact.

Based only on actual evidence, rather than tradition etc.

Such that it is obvious if any tampering has occurred.

plural of demurrer to evidence

Information (to support or refute a theory) supported by scientific experimentation or statistical analysis, involving testable observations made using the physical senses or using instruments which extend the senses.

(medicine) Health care whose policies and practices are derived from the systematic, scientific study of the effectiveness of various treatments.

(law) A legal standard for deciding the outcome of a dispute: evidence that clearly indicates that a claim is more likely to be true than not, without needing to eliminate all doubt.

(US, law) Evidence discovered after a legal decision has been reached. A party may attempt to have the decision reversed using this evidence. They must first prove that the evidence could not have been discovered until after the decision was reached.