What is the process for verifying that both the parent and child columns are marked with an X in correlation to each other?

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The process for verifying that both the parent and child columns are marked with an X in correlation to each other can be done through the following steps:

1. Identify the parent and child columns in the data set.
2. Locate the row containing the first parent-child pair.
3. Check if the cell in the parent column is marked with an X.
4. Check if the cell in the child column is marked with an X.
5. If both cells are marked with an X, move on to the next row.
6. If one or both cells are not marked with an X, there is a mismatch in the data and investigation is required.
7. Repeat steps 3-6 for all parent-child pairs in the data set.