The example keeps guess, reveal, and comparison as separate steps. Its fictional maker Kai enjoys drawing maps, has made a paper boat, and has not made a paper robot. A completed demonstration can record S2 before revealing S3 as the authored false statement. The page then reports that the IDs differ, preserving the original choice instead of replacing it with the key.
Prepare a public statement set
Use exactly three public statements: S1 “I enjoy drawing maps”; S2 “I have made a paper boat”; S3 “I have made a paper robot.” Keep stable IDs even if the cards are displayed in another order. The creator sheet holds Kai's full fictional profile and identifies S3 as the deliberate false claim. The public statements alone are not an exhaustive logic puzzle. A partner is choosing a plausible guess, not proving private history from the wording or detecting a person's honesty.
For a live turn, give the partner only the statement cards. Keep the creator profile separately until the reveal. This article explains the profile so a teacher can prepare the activity; the page demonstrates the sequence openly with a client-side key. A hidden key in a web page is not secure just because a learner cannot initially see it. Use separately distributed paper cards when you need the answer withheld during actual play, and keep real personal information out of the demonstration.
Lock before showing the answer
Choose S2 and select Record guess. The page preserves that ID and disables further choices for the current turn. Reveal creator key then displays S3 and the source explanation: Kai has not made a paper robot. The comparison says the guess differs from the supplied key. Choosing S3 in a new turn produces a matching comparison. Neither message diagnoses lying, confidence, personality, or ability. It only describes a relationship between the partner's recorded ID and the packet author's declared ID.
The reveal button requires a recorded guess. An empty selection is incomplete; it cannot become correct by being filled with the eventual answer. If you run the activity on paper, use separate spaces for pre-reveal guess, optional reason, reveal status, creator-confirmed key, and comparison. The author explains the key from the supplied profile. A partner's persuasive reason never becomes evidence that the profile was different; distinguish the guessing process from the creator's factual stipulations.
Keep the follow-up neutral
Ask, “Which statement did you choose before the reveal?” Then ask what creator information explains S3. A question about which map Kai might draw is a possible conversation prompt, not another established fact. The fictional route can carry the whole lesson. Offer a pass or agreed written participation instead of requiring names, photos, family details, or personal confessions. A voluntary personal-interest variant should respect the participant's chosen boundaries and does not turn the sheet into a personal-history verification system.
If a statement changes, begin a fresh version and ask for another guess. Keep any earlier paper turn with its own statements, key, and first choice. On the page, Reset starts an unrecorded turn; it does not erase an external class ledger or save a record. Finish by checking what was known before the reveal and what the creator added afterward. That contrast gives the activity a useful discussion outcome without making an incorrect guess an accusation against the partner or the author.
Make your own working example
Create an original fictional Two Truths and a Lie sequence for maker Kai. Public statements: S1 I enjoy drawing maps; S2 I have made a paper boat; S3 I have made a paper robot. Creator profile confirms S1 and S2 and says Kai has not made a paper robot, so the authored false key is S3. Do not portray the key as a logical deduction from the public statements.
Provide three choice buttons, Record guess, Reveal creator key, and Reset. Initially no guess is recorded. Record requires a selection, locks the selected ID for the current turn, and prevents later choices changing it. Reveal requires the recorded guess and shows S3 plus its profile explanation. An S2 guess differs; an S3 guess matches. Preserve the first guess in both outcomes.
Show a neutral follow-up asking what information became available at reveal. The open practice key is client-side and not confidential; recommend separately distributed creator cards for actual play. Reset clears only this demonstration turn. Use a fictional profile or pass, no required personal biography, honesty score, saved learner record, or personality inference.
Use one self-contained HTML file with no remote dependency. Keep the initial sample, output, and labeled controls near the top. Use at least 16px text, strong contrast, visible focus, and a stacked layout at 360px without horizontal overflow. Use explicit type=button click handlers and explicit DOM selectors; do not depend on native form submission. Clear stale feedback when task inputs change. Render entered text safely. Keep practice data local to the current page; do not imply saving, sending, or production integration. Return only the finished HTML.
Prepare the next class copy
Before another group plays, revise the static follow-up question to focus on the information revealed rather than whether a partner seemed believable. In NOS, eligible static instructions can be revised in visual editing mode without asking AI to regenerate the HTML. Keep the teacher's source packet and actual learner work separately; use the reading copy to clarify the next activity.