what parts does opinion play in a expository essay?

Answer 1

Exposition
Expose
to reveal something hidden

An opinion is not worth a tinker's dam in expository writing or speaking because it does not inform, explain, describe, or reveal the details about the topic.

Keep the opinions to your self.

Do you see how the opinion, "tinker's dam" - revealed nothing to you? Why? Because you lack the common culture of the American pioneer woman who hired the itinerant tinkerer, in his horse-drawn wagon, who came once a year to repair the broken pots and skillets she had to prepare her family's food in.

So, now you wonder why she didn't just hop in the family wagon, drive into town, and buy herself a new set of matching cookware at the local mercantile that is just a hop, skip and a jump from the train station.
Hop in the family wagon ... um. She had to go get the wagon, get the hay-burner, attach the harness to the hay-burner and harness with the hay-burner to the wagon.
Hay burner - you don't know what a hey burner is ? It is a large quadruped that has the brains of a two year-old child - a horse, of course.

to harness - the power-drive device used to signal and control a horse drawn wagon - and how the driver controls the harness to the horse to the wagon.

the driving lesson -

How far off track are we now?

Off track!?
Oh dear ... must explain the westward expansion and trains and new words in the language and why opinions - like the first tinker's dam- do not belong in an essay.

I hope the example went -- far, off field -- and it is clear probably as clear as mud.
That is what opinion does. It muddies things. Yup, that is my opinion of what part an opinion plays in an expository essay.
Stick to the facts.

This is the first wiring and not a reviewed - polished piece - just an opinion of "what parts does opinion play in a expository essay?"


Edit function - this is an addition- an after thought.

A tinker's dam was a repair made from an amalgam of "things" to make cookware whole and useful again. It was temporary and never lasted any length of time.
A tinker's dam became a culturally understood expression for: shoddy, temporary, poor quality, disappointing, not worth the money ... work.
tinker's dam : a "word" that is a description of a cultural event and a cultural item, and it is culturally understood.

Clear as mud?
Did you learn anything?
What is the value (the part) of opinion in a piece that is designed to teach - to inform - to reveal something hidden?
What function does opinion fulfill
What does opinion explain
What does opinion reveal of the details of the topic/subject?

If nothing, opinion had no role..
Did it reveal something hidden? then it had a role.

Have I taken it full circle?

(I edited the typos.)