What type of evidence is typically not admissible in court when discussing deeds?

The correct choice highlights the principle that parol evidence is generally not admissible in court when interpreting the terms of a deed that has been executed in writing. This principle is rooted in the parol evidence rule, which states that if a written contract is clear and unambiguous, external evidence that seeks to add to, modify, or contradict the terms of that written document is not permitted.

When a deed is properly executed and contains all necessary components, it serves as the definitive and complete expression of the parties' intentions. Introducing parol evidence could disrupt the integrity and clarity that the written deed is meant to provide. This means that parties cannot use oral statements or written communications made prior to or at the same time as the deed to alter or interpret its established terms.

Other types of evidence, such as corroborative evidence (which supports the deed's legitimacy), documentary evidence (such as previous deeds or official records), and witness testimony, can be admissible under certain circumstances to clarify points but not to contradict the settled terms of an existing deed.