In this setence: "Your guesses are better than most people's facts." the word "are" is A) simple predicate.
A simple predicate is the main vern of the sentence, the rest of the words together with the main verb is called compund predicate, but this is not the case since the main verb "are" is separated from the rest when asking about its description on the sentence.
here we have another example of a simple predicate:
I like eating pizza and Nachos.
