The offline interactive has no network, analytics or storage. It uses invented parcel-label states, never a real service or personal record. This page provides every input, result and meaningful rule in selectable text for paper, Braille, AAC or a directed scribe. No browser is necessary.
Rule and page order
Top heading: Paper parcel rule lab. Introduction: READY requires readable AND reviewed. An unknown input asks for a data check, not a silent NO. Section Predict, then test instructs the learner to write/say a prediction before selecting inputs. Two labelled controls ask Label readable? and Label reviewed?, each with Yes, No, Unknown. Button Run rules compares the required AND rule and a deliberately faulty OR rule. An initially empty status region says “No case has been run yet.”
Complete expected cases
| Readable | Reviewed | Required AND | Deliberately faulty OR | Exposes fault? |
|---|---|---|---|---|
| Yes | Yes | READY | READY | No |
| Yes | No | NOT READY | READY | Yes |
| No | Yes | NOT READY | READY | Yes |
| No | No | NOT READY | NOT READY | No |
| Unknown | Yes | CHECK DATA | CHECK DATA | Missing data; early branch |
| Yes | Unknown | CHECK DATA | CHECK DATA | Missing data; early branch |
| Unknown | Unknown | CHECK DATA | CHECK DATA | Missing data; early branch |
The early UNKNOWN check is an explicit teaching policy, not an implementation of every possible three-valued logic system. Pseudocode: if either input is UNKNOWN: CHECK DATA; else if readable AND reviewed: READY; else: NOT READY. A card or scribe route can use the same table. Ask learners to predict an exposing case before reading the answer table if first-response evidence matters; the published table makes this tool a practice aid, not a secure test.
Page-parts panel
Expandable heading Show page parts for Day 16 explains: content is the displayed words “Paper parcel rule lab”; structure is markup <h1>Paper parcel rule lab</h1> marking a top heading; presentation is CSS h1 { color: #173b50; } changing appearance without changing the words or heading meaning. Colour is not the only status cue. The page footer credits original SubjectNest content and separate Apache-2.0 code.
Tactile build: Make READABLE and REVIEWED cards with YES/NO/UNKNOWN sides. Pass them through an AND gate card only after an UNKNOWN checkpoint. Put result word cards READY, NOT READY and CHECK DATA at the end. Run all four known pairs, then unknown+yes. The learner states which test case exposes OR versus AND.
Original resource rights: © NeuroForgeIO Pty Ltd 2026, SubjectNest, CC BY 4.0. Credit author, source, licence and changes. Interactive code marked Apache-2.0.