What is the predicate for Mr Dowdy a good author?

The predicate in the sentence "Mr. Dowdy is a good author" is "is a good author".

Here's why:

* Subject: The subject of the sentence is "Mr. Dowdy", the person being discussed.

* Predicate: The predicate tells us something about the subject. In this case, it tells us that Mr. Dowdy possesses the quality of being a good author.

Let me know if you have any other sentences you'd like to analyze!