Negation, Quantifier Scope, and Ambiguity

What you’ll learn

Distinguish not all, none, and other scope relationships.

បែងចែកន័យបដិសេធមួយផ្នែក និងបដិសេធទាំងអស់។

Meaning and use

Not all means some members fall outside a statement; it does not mean none. All did not can be ambiguous, so rewrite when precision matters. Not necessarily rejects inevitability rather than truth. Scope depends on syntax, context, and stress, so an explicit paraphrase is often the safest editorial choice.

Not all មានន័យថាមិនមែនទាំងអស់ មិនមែនថាគ្មានសោះទេ។ None មានន័យថាគ្មានមួយណា។ Not necessarily បដិសេធភាពចាំបាច់ មិនមែនបដិសេធថាអាចពិតទេ។

Grammar patterns

Pattern	Example or form
Partial versus total negation	Not all passed. / None passed.
Limited rejection	Expensive does not necessarily mean better.

Examples

1. Not every applicant was interviewed.

   មិនមែនបេក្ខជនគ្រប់រូបត្រូវបានសម្ភាសទេ។

2. None of the applicants was selected.

   គ្មានបេក្ខជនណាម្នាក់ត្រូវបានជ្រើសរើសទេ។

3. Both answers are not necessarily wrong.

   ចម្លើយទាំងពីរមិនចាំបាច់ខុសទេ។

4. A longer answer is not always a better answer.

   ចម្លើយវែងជាងមិនមែនតែងតែល្អជាងទេ។

Everyday conversation

Dara: Did everyone pass?

Maly: Not everyone. Most passed, but three students need another attempt.

Common mistakes

Instead of	Use	Why
Not all students passed. (intended: nobody passed)	No students passed.	Not all is partial negation, not total exclusion.
Every applicant were not selected.	Not every applicant was selected.	Every applicant is singular; this wording clearly expresses partial negation.

Practice

Try these questions before opening the answers. Write or say each answer.

សាកល្បងឆ្លើយសំណួរទាំងនេះជាមុនសិន មុននឹងបើកមើលចម្លើយ។ អ្នកអាចសរសេរ ឬនិយាយចម្លើយរបស់អ្នក។

1. Does Not all the rooms are open mean every room is closed?
2. Rewrite unambiguously for zero selections: All applicants were not selected.
3. Explain More expensive does not necessarily mean better.

Answers and explanations

Show answers / បង្ហាញចម្លើយ

1. No.

   It says at least some are not open; it does not specify that all are closed.

2. No applicants were selected.

   This explicitly expresses total negation.

3. A higher price does not guarantee higher quality.

   It leaves open that some expensive items may be better.

Quick recap

• Partial versus total negation: Not all passed. / None passed.
• Limited rejection: Expensive does not necessarily mean better.