Quality
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
Quality is whether a statement affirms class membership (affirmative: A, I) or denies it (negative: E, O).
Show
Quantity plus quality uniquely fixes the form: universal + negative = E.
Watch for
"Quality" here has nothing to do with goodness. It's affirm-or-deny, nothing more.