What is the rule that states the meaning of a deed or written documents must be based solely on its textual content?

The Four Corners rule establishes that the interpretation of a deed or written document should be confined to the content within its four corners, meaning all necessary information for understanding the document's intent and provisions should be found in the text itself. This legal principle asserts that extrinsic evidence, or outside information, cannot be used to interpret or contest the meaning of the language in the document.

This approach is essential because it emphasizes the importance of the written word and promotes clarity and certainty in legal documents. By restricting interpretation to the text, the Four Corners rule helps prevent disputes and misunderstandings regarding the intent of the parties involved. Hence, it serves as a vital guideline in real estate transactions and contract law, ensuring that the agreed-upon terms are honored as they are expressly written.