# Question 5751: Open-Sentence Binding and Truth Eligibility

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This teaching derivation has second-context AI mathematical and bilingual semantic review, limited to the model and assumptions stated in this question. It has no human review or new Lean proof and does not promote the original question or MKO to Canonical truth.

R0010-05751 · q-20261008-advance-20261012-r03-proposition-0026



## Original question and givens

In the classical integer context, consider x≤-2 with assignment=null (unbound). Give (is the sentence closed?, its bound truth value or open, substitution difference or not-applicable).


- G001 — In the classical integer context, consider x≤-2 with assignment=null (unbound). Give (is the sentence closed?, its bound truth value or open, substitution difference or not-applicable).





## Definition and scope

Use the original question domain, assumptions and cited MKO definitions. This item has second-context mathematical and bilingual review, with the model, answer and every arithmetic step independently recomputed from the original parameters; the source question remains a candidate.


- [mko-proposition](https://ocme.evemisslab.com/en/mko/mko-proposition/)





## Step-by-step derivation

S001 · impliesBefore

classical integer formulas with explicit binding/data

After

a truth verdict is not a delivered general proof object

Conditions: none

A false closed statement is still a proposition.These finite substitutions and comparison witnesses do not promote a truth label to a general formal proof or completeness of arbitrary inference rules.

Step identifiers and dependenciesRule: proposition_truth_and_proof_scope · Uses: G001





S002 · impliesBefore

formula x≤-2;assignment=null

After

no bound integer for x;leave truth and numeric difference inapplicable

Conditions: none

No x binding is supplied in this protocol;do not assign a fixed truth value or silently add a universal quantifier.Unbound is not False,and null is not0.

Step identifiers and dependenciesRule: unbound_formula_not_false · Uses: G001, S001









## Reverse checks


- S002 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
- S001 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.





## Result

(No, open, not-applicable)

The full substitutions and premise checks give the original answer; source identity,format and status are unchanged.





## This question review and source binding

Review date: 2026-10-26

Original questions, answers, step expressions, numeric ASTs and historical records are retained. Source candidate labels remain historical and are not overwritten as formal proof.

Source hashes and review receipts
- input commit: 0f7be61e2c22317a4075561dc822c87d881a50db
- original question SHA-256: 0213658fad3206e7b0ee2063567e34f2c15c4d2cf79a36b1187d7704aa0d11e5
- candidate record SHA-256: f7b979d81aef8dff8b5a7cbe7b7d6557c3584392e4a5f30e60fd3ed3fbe8ae26
- semantic review receipt SHA-256: 0328166a2e335aac7a5fb34556e68c80ba7d16612e822b3999c8ac348a9ca06f
- question-first witness SHA-256: 0da18e4e6cf71ece5ec5f00dd0cd161217b6d251672bc0b46d79fe7e6253f5fc
- Lean: NOT_RUN · human review: NOT_PERFORMED

[Same-source full JSON](https://ocme.evemisslab.com/data/question-derivations/questions/q-20261008-advance-20261012-r03-proposition-0026.json)