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Question 5637: Typed Membership Queries and Truth Values

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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R0010-05637 · q-20261008-advance-20261012-r04-set-membership-0012

Original question and givens

The finite type is Fin(6)={0,…,5}. Complete characteristic table bits=[0, 0, 0, 1, 1, 1] uses 0/1 membership from index 0; ordered queries=[0, 1, 2]. Give (type-eligibility mask, membership truth values or ill-typed).

  • G001 — The finite type is Fin(6)={0,…,5}. Complete characteristic table bits=[0, 0, 0, 1, 1, 1] uses 0/1 membership from index 0; ordered queries=[0, 1, 2]. Give (type-eligibility mask, membership truth values or ill-typed).

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

declared finite type or bounded integer universe

After

membership truth is distinct from eligibility to ask the question

Conditions: none

Being outside the type is not the same as false membership.Check only the declared finite type or integer set,not all set theory or unrestricted comprehension.

Step identifiers and dependencies

Rule: finite_membership_scope · Uses: G001

S002 · implies

Before

legal index=0∈Fin(6);bit=0

After

membership=False

Conditions: none

In the complete characteristic table,1 means true membership and0 false;both are valid typed judgments.

Step identifiers and dependencies

Rule: complete_characteristic_bit · Uses: G001, S001

S003 · implies

Before

legal index=1∈Fin(6);bit=0

After

membership=False

Conditions: none

In the complete characteristic table,1 means true membership and0 false;both are valid typed judgments.

Step identifiers and dependencies

Rule: complete_characteristic_bit · Uses: G001, S002

S004 · implies

Before

legal index=2∈Fin(6);bit=0

After

membership=False

Conditions: none

In the complete characteristic table,1 means true membership and0 false;both are valid typed judgments.

Step identifiers and dependencies

Rule: complete_characteristic_bit · Uses: G001, S003

S005 · implies

Before

legal index=3∈Fin(6);bit=1

After

membership=True

Conditions: none

In the complete characteristic table,1 means true membership and0 false;both are valid typed judgments.

Step identifiers and dependencies

Rule: complete_characteristic_bit · Uses: G001, S004

S006 · implies

Before

legal index=4∈Fin(6);bit=1

After

membership=True

Conditions: none

In the complete characteristic table,1 means true membership and0 false;both are valid typed judgments.

Step identifiers and dependencies

Rule: complete_characteristic_bit · Uses: G001, S005

S007 · implies

Before

legal index=5∈Fin(6);bit=1

After

membership=True

Conditions: none

In the complete characteristic table,1 means true membership and0 false;both are valid typed judgments.

Step identifiers and dependencies

Rule: complete_characteristic_bit · Uses: G001, S006

S008 · implies

Before

query=0;legal in Fin(6)=Yes

After

False

Conditions: none

Check typing before reading a bit;do not replace ill-typed with False.For Fin(0),every integer query is outside the type.

Step identifiers and dependencies

Rule: typed_membership_query_guard · Uses: G001, S007

S009 · implies

Before

query=1;legal in Fin(6)=Yes

After

False

Conditions: none

Check typing before reading a bit;do not replace ill-typed with False.For Fin(0),every integer query is outside the type.

Step identifiers and dependencies

Rule: typed_membership_query_guard · Uses: G001, S008

S010 · implies

Before

query=2;legal in Fin(6)=Yes

After

False

Conditions: none

Check typing before reading a bit;do not replace ill-typed with False.For Fin(0),every integer query is outside the type.

Step identifiers and dependencies

Rule: typed_membership_query_guard · Uses: G001, S009

Reverse checks

  • S010 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S009 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S008 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • 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

([Yes, Yes, Yes], [False, False, False])

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: 3dfbd5a715cae57adf1f11860a8201178b3ef70684292dee961dd926cf9eb51f
  • candidate record SHA-256: 46e5cdbff89b9098b8de5b5114e1ffa6bef029976052ced112ac87d1ecf15fc4
  • semantic review receipt SHA-256: 0328166a2e335aac7a5fb34556e68c80ba7d16612e822b3999c8ac348a9ca06f
  • question-first witness SHA-256: 0da18e4e6cf71ece5ec5f00dd0cd161217b6d251672bc0b46d79fe7e6253f5fc
  • Lean: NOT_RUN · human review: NOT_PERFORMED
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