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Question 4384: Complete Finite Predicate Partition

On this page
  1. Original question and givens
  2. Definition and scope
  3. Step-by-step derivation
  4. Reverse checks
  5. Result
  6. This question review and source binding

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R0007-04384 · q-20261008-advance-20261010-r07-quantifier-0009

Original question and givens

The explicitly finite integer domain is U=[-8, -1, 0, 1, 8] and P(x) means 2 divides x (nonzero divisor). Give (elements satisfying P, elements not satisfying P), each sorted increasingly.

  • G001 — The explicitly finite integer domain is U=[-8, -1, 0, 1, 8] and P(x) means 2 divides x (nonzero divisor). Give (elements satisfying P, elements not satisfying P), each sorted increasingly.

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.

Step-by-step derivation

S001 · implies

Before

complete finite U=[-8, -1, 0, 1, 8]

After

universal on empty domain=True;existential on empty domain=False

Conditions: none

Enumerate only the declared finite domain;empty-domain universals are true and existentials false.Complete finite enumeration does not extend to an infinite domain.

Step identifiers and dependencies

Rule: finite_quantifier_scope · Uses: G001

S002 · implies

Before

x=-8;predicate=divides 2

After

P(x)=Yes

Conditions: none

Evaluate the declared decidable integer predicate for each element,retaining both true and false cases.

Step identifiers and dependencies

Rule: finite_predicate_row · Uses: G001, S001

S003 · implies

Before

x=-1;predicate=divides 2

After

P(x)=No

Conditions: none

Evaluate the declared decidable integer predicate for each element,retaining both true and false cases.

Step identifiers and dependencies

Rule: finite_predicate_row · Uses: G001, S002

S004 · implies

Before

x=0;predicate=divides 2

After

P(x)=Yes

Conditions: none

Evaluate the declared decidable integer predicate for each element,retaining both true and false cases.

Step identifiers and dependencies

Rule: finite_predicate_row · Uses: G001, S003

S005 · implies

Before

x=1;predicate=divides 2

After

P(x)=No

Conditions: none

Evaluate the declared decidable integer predicate for each element,retaining both true and false cases.

Step identifiers and dependencies

Rule: finite_predicate_row · Uses: G001, S004

S006 · implies

Before

x=8;predicate=divides 2

After

P(x)=Yes

Conditions: none

Evaluate the declared decidable integer predicate for each element,retaining both true and false cases.

Step identifiers and dependencies

Rule: finite_predicate_row · Uses: G001, S005

S007 · implies

Before

[[-8, Yes], [-1, No], [0, Yes], [1, No], [8, Yes]]

After

T=[-8, 0, 8];F=[-1, 1];T∪F=U and T∩F=∅

Conditions: none

The true and false parts are disjoint and cover the deduplicated domain;unlisted integers are not counterexamples.

Step identifiers and dependencies

Rule: complete_truth_partition · Uses: G001, S006

Reverse checks

  • S007 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S006 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S005 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S004 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S003 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • 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

([-8, 0, 8], [-1, 1])

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: c39ba4e8208bf19c642c585db14184327c8d79b2a6050215ac8fcb43a9dfa0d4
  • candidate record SHA-256: 626955123c1b4309b8c6bf2a88b1de4d9e5066a79536f9fc88524d80835eb82b
  • semantic review receipt SHA-256: faf0582c0184613e6fae207374056133eae600883a29c67d8438113bbe3c485a
  • question-first witness SHA-256: 4b283b6ff424b1d22caa36f3552b0fa21b1b66a0a883d7cbe9cedc8dd77b2e42
  • Lean: NOT_RUN · human review: NOT_PERFORMED
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