In one sentence, describe what the following article is about:

Mixed in with your dry navy beans may be stones or discolored kernels . Discoloration is usually a sign that the bean isn't fit for consumption, so you should remove these along with stones from the good beans.  Canned navy beans can be prepared more easily than dry beans. You'll only have to cook these lightly for a short time with your ingredients and then the beans will be ready for eating.  For the purposes of providing a guided example, the process of making navy beans on the stove top is provided. However, you may find making your beans in a slow cooker to be a preferred method. Get a large pot or bowl and place the good beans inside of it. Then run cold water over the beans to remove any impurities or bacteria from the surface of the beans. When you've finished this, you can use a strainer to remove the dirty water from the beans in your bowl/pot.

Summary:
Pick out bad beans. Rinse your beans.