What type of markups can lead to errors if edited simultaneously by multiple reviewers?

Text markups can lead to errors when edited simultaneously by multiple reviewers because they involve changes to the actual content of the document. When different reviewers attempt to modify text at the same time, it can create conflicts in the content, leading to overwritten text or inconsistencies between the changes made by each reviewer. This can complicate the editing process, as it becomes challenging to retain the original intent of changes or to maintain clarity in the document.

In contrast, annotations and comments are typically supplementary to the main text and do not alter the content directly. They can be added or edited without affecting the actual text, making them less prone to errors from simultaneous edits. Thus, while they can have their own complexities, they do not carry the same risk of conflicting changes as text markups do when multiple reviewers are involved. The understanding that text markups directly change the content establishes why they present a higher risk for errors in collaborative editing situations.