As someone who regularly encounters these types of diagrams, I guess that I&#x27;m too close to the issue, because I&#x27;m not seeing the problem.  To answer your question, financial e-mails are more likely to be mislabelled as personal than as professional, but not as often as it labels them correctly.<p>A quick curosry glance at the central diagonal tells me that Finance, Personal&#x2F;Programming, Professional&#x2F;EPFL, and Group work are the categories of e-mail which are most likely to be categorized incorrectly by the software.  Looking at the columns tells me that the Academic and Personal are going to have the most misfiled messages in them.