Okay, I own up! The tag-line for this site—“A Blog About Theology, Thinking, Reading, Writing, and Teaching”—does have an “Oxford comma,” aka the “serial comma.”
The “Oxford comma” is the comma placed before the word “and” in a list of three or more items for the purpose of clarification. The “Grammarly Blog” offers this humorous example of its merit:
I love my parents, Lady Gaga and Humpty Dumpty.
Reading time: 2 min