Yes—but it’s better to handle unclear images as regular tags rather than as recognized faces.

If a face is blurry, obscured, or not really visible, you can still tag the photo with that person’s name so it appears in searches later. The safer approach is to turn off face recognition for those photos and manually apply the person’s name from the tag list. That gives you the organizational benefit without teaching the face-recognition system from poor examples.

That said, one user reported including many blurry faces and Elements still worked fine. So it’s not likely to be disastrous if you do tag some of them. In practice, this is mostly a workflow choice: tag unclear photos if they’ll be useful to you later, and skip them if they won’t.

In short: for best accuracy, manually tag unclear shots instead of feeding them into face recognition.