Whenever we use a word to label something, we define a scope / limit to what it is.
We don't always agree to what that scope or limit is.
This is a source of many frustrating arguments.

For instance, when does something deserve the label "Life"? What threshold is crossed? When does it pass back over that threshold, and is that always called "Death"?

We all think we know the answer, but this is at the root of much disgust and animosity in many cultures.