A more thorough explanation:

Partial integration refers to a situation where an agreement between two parties is not fully expressed or does not capture the complete intent of the parties. This can occur in both oral discussions and written documents.

For example, if two parties agree to a contract but the written document does not include all of the terms that were discussed, then the written document is a partial integration. In such cases, parol evidence (evidence outside of the written document) may be admissible to clarify any ambiguities or missing terms.

Another example could be a verbal agreement between two friends to split the cost of a vacation, but they do not discuss all of the details such as travel dates, accommodations, and activities. In this case, the verbal agreement is a partial integration and may require further discussion and clarification.

Overall, partial integration can lead to misunderstandings and disputes between parties, which is why it is important to ensure that all agreements are fully expressed and capture the complete intent of the parties involved.