Compare two propositions:
“This door is open.” — the predicate open is affirmed of the door: affirmative judgment.
“This door is not open.” — the same predicate is denied: negative judgment.
Both require understanding the door and openness before assessing the predication.
A common mistake is to exclude negative propositions from assent. Tasdiq is not limited to positive predication; correctly affirming that a relation does not hold can also constitute assent.