This will give you an approximate idea of what type of information you are looking for in the article. "Duplicate" has a few additional pieces you'll need to look after, but if you trust other people's instincts, it can be easy for you to discern.
If there are no reasons on that line, look for the Edit button in the article preview below the box displaying the article statistics, click it. Look at the article's wikitext in that mode. If you click the Edit to Save button, you won't have the opportunity to click the Vote to Delete button if you feel a deletion is necessary as clicking the Edit to Save button will already pre-plan a Vote to Keep vote. The Edit button won't do that, but will give you the option to see what reason might have been added after the initial NFD template was added. NFD Guardian only displays the reason from the first round of reasons for NFD templates when they were first edited. As a reminder, the chart located here, gives these deletion reasons one more time. However, as a New Article Booster or Admin, you should already be familiar with all of these reasons.