A more thorough explanation:

Definition: Interpolation is the act of adding words to a document to change or clarify its meaning. It can also refer to adding false words to a document to change its meaning.

Example: If a student writes an essay and realizes that they left out an important detail, they may interpolate by adding a sentence to clarify their point. However, if someone adds false information to a document to make it seem like someone said something they didn't, that is an example of negative interpolation.

Explanation: Interpolation can be a helpful tool for improving the clarity of a document. However, it can also be used to manipulate the meaning of a document, which is not ethical. The example of a student adding a sentence to clarify their point shows how interpolation can be used to improve a document's meaning. The example of adding false information shows how interpolation can be used to change a document's meaning in a negative way.