Lay a foundation
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| Evidence |
|---|
| Part of the common law series |
| Types of evidence |
| Testimony · Documentary evidence |
| Physical evidence · Digital evidence |
| Exculpatory evidence · Scientific evidence |
| Demonstrative evidence |
| Hearsay: in U.K. law · in U.S. law |
| Relevance |
| Burden of proof |
| Laying a foundation |
| Subsequent remedial measure |
| Character evidence · Habit evidence |
| Similar fact evidence |
| Authentication |
| Chain of custody |
| Judicial notice · Best evidence rule |
| Self-authenticating document |
| Ancient document |
| Witnesses |
| Competence · Privilege |
| Direct examination · Cross-examination |
| Impeachment · Recorded recollection |
| Expert witness · Dead man statute |
| Hearsay (and its exceptions) |
| Excited utterance · Dying declaration |
| Party admission · Ancient document |
| Declarations against interest |
| Present sense impression · Res gestae |
| Learned treatise · Implied assertion |
| Other areas of the common law |
| Contract law · Tort law · Property law |
| Wills and Trusts · Criminal law |
In law, to lay a foundation means to provide sufficient preliminary evidence of the authenticity and relevance for the admission of material evidence in the form of exhibits or testimony of witnesses. Material evidence is important evidence that may serve to determine the outcome of a case. Exhibits include real evidence, illustrative evidence, demonstrative evidence, and documentary evidence. The type of preliminary evidence necessary to lay the proper foundation depends on the form and type of material evidence offered.
The lack of foundation is a valid objection that an adverse party may raise during trial.