Editor-selected existing cases and prompts, separate from AI news. Selection dates use Hong Kong time.
Five original text exercises: coupon order, cross-zone dates, caption reading rates, image alt text and quotations versus paraphrases. Fictional fixtures and human checks, not tested results. Includes official Gemini web eligibility and limits for Hong Kong, Macau and Taiwan.
Compare two discount orders from supplied terms without assuming offers can be combined. Officially documented feature · Workflow untested
Prompt
Using only [merchant terms] and [base price, currency, shipping and tax], list eligibility, operation order and each intermediate amount. Mark missing stacking rules unknown. Do not choose the most favorable interpretation. Calculate only; do not purchase.
Fictional fixture: price 100 units; A applies 20% off then subtracts 10; B subtracts 10 then applies 20% off. Shipping and tax are zero.
Evidence limits and cautions
Original text-only exercise with fictional examples, not observed user outcomes. Official documentation supports text prompting, not the effectiveness of this exercise. Document publication date unspecified; checked 2026-11-13.
Original text-only exercise with fictional examples, not observed user outcomes. Official documentation supports text prompting, not the effectiveness of this exercise.
- Prefer an adult personal account. Official web lists include Hong Kong, Macau, Taiwan and Traditional Chinese. Local connections were not tested.
- Standard limits exist without a paid plan. Usage caps vary; local paid prices are unverified. No specific model or prompt count is guaranteed.
- Mobile/API/CLI are outside this check. No accounts are read, devices controlled, messages sent or purchases made. Do not supply secrets; activity-off chats may remain for 72 hours and receive safety processing.
Original source: Google: Use Gemini Apps
Convert deadlines with explicit UTC offsets and flag missing timezone details. Officially documented feature · Workflow untested
Prompt
Convert [source date/time and offset for that date] to [target offset for that date]. Show original, intermediate UTC and target date/time. Preserve the wording. Flag missing offsets or daylight-saving evidence; do not guess from a city. Do not create calendar events or commit to deadlines.
Fictional fixture: 2026-11-13 23:30 UTC−5 to UTC+8. A second item only says Friday evening.
Evidence limits and cautions
Original text-only exercise with fictional examples, not observed user outcomes. Official documentation supports text prompting, not the effectiveness of this exercise. Document publication date unspecified; checked 2026-11-13.
Original text-only exercise with fictional examples, not observed user outcomes. Official documentation supports text prompting, not the effectiveness of this exercise.
- Prefer an adult personal account. Official web lists include Hong Kong, Macau, Taiwan and Traditional Chinese. Local connections were not tested.
- Standard limits exist without a paid plan. Usage caps vary; local paid prices are unverified. No specific model or prompt count is guaranteed.
- Mobile/API/CLI are outside this check. No accounts are read, devices controlled, messages sent or purchases made. Do not supply secrets; activity-off chats may remain for 72 hours and receive safety processing.
Original source: Google: Use Gemini Apps
Calculate reading rates from caption text and timestamps for human retiming. Officially documented feature · Workflow untested
Prompt
Count [caption rows] using [counting rule], calculate duration as end minus start and characters per second, then compare with [chosen limit]. Flag nonpositive duration without dividing. Preserve the original and suggest splits, not completed video edits. Do not invent a universal industry standard.
Fictional fixture: count Chinese characters only, excluding punctuation; chosen limit 4/second. S1 今天一起整理資料, 0–2s; S2 請先核對來源資料, 2–3s; S3 完成, 4–4s.
Evidence limits and cautions
Original text-only exercise with fictional examples, not observed user outcomes. Official documentation supports text prompting, not the effectiveness of this exercise. Document publication date unspecified; checked 2026-11-13.
Original text-only exercise with fictional examples, not observed user outcomes. Official documentation supports text prompting, not the effectiveness of this exercise.
- Prefer an adult personal account. Official web lists include Hong Kong, Macau, Taiwan and Traditional Chinese. Local connections were not tested.
- Standard limits exist without a paid plan. Usage caps vary; local paid prices are unverified. No specific model or prompt count is guaranteed.
- Mobile/API/CLI are outside this check. No accounts are read, devices controlled, messages sent or purchases made. Do not supply secrets; activity-off chats may remain for 72 hours and receive safety processing.
Original source: Google: Use Gemini Apps
Draft alt text from a supplied image description and page purpose without inventing identity or emotion. Officially documented feature · Workflow untested
Prompt
Draft alt text in [language] using only [human image description] and [page purpose]. State that you have not seen the image. Retain essential information for informative images; for purely decorative use, suggest human review of empty alt text, not automatic application. Do not infer identity, emotions or undescribed details. Ask when purpose is unclear.
Fictional fixture: description is a bar chart with A 10 and B 15, units items. Purpose A compares quantities. Purpose B is decorative beside equivalent complete data.
Evidence limits and cautions
Original text-only exercise with fictional examples, not observed user outcomes. Official documentation supports text prompting, not the effectiveness of this exercise. Document publication date unspecified; checked 2026-11-13.
Original text-only exercise with fictional examples, not observed user outcomes. Official documentation supports text prompting, not the effectiveness of this exercise.
- Prefer an adult personal account. Official web lists include Hong Kong, Macau, Taiwan and Traditional Chinese. Local connections were not tested.
- Standard limits exist without a paid plan. Usage caps vary; local paid prices are unverified. No specific model or prompt count is guaranteed.
- Mobile/API/CLI are outside this check. No accounts are read, devices controlled, messages sent or purchases made. Do not supply secrets; activity-off chats may remain for 72 hours and receive safety processing.
- Alt-text guidance: W3C image decision tree https://www.w3.org/WAI/tutorials/images/decision-tree/
- Functional images need their action or purpose described; complex charts need complete text or data separately. Empty alt is not an omitted alt attribute.
Original source: Google: Use Gemini Apps
Compare short summaries with authorized source text so paraphrases are not presented as direct quotes. Officially documented feature · Workflow untested
Prompt
Compare [authorized source and paragraph IDs] with [summary]. Label each sentence as direct quote, paraphrase, inference or unsupported. Direct quotes must match exactly; omissions must be explicit and preserve meaning. Suggest minimal edits with source paragraphs, never invented quotations, page numbers or authors. Retain uncertainty.
Fictional fixture: P1 says This sample includes only voluntary respondents. Summary A: The author says “Everyone agrees.” Summary B: The sample comes from voluntary respondents.
Evidence limits and cautions
Original text-only exercise with fictional examples, not observed user outcomes. Official documentation supports text prompting, not the effectiveness of this exercise. Document publication date unspecified; checked 2026-11-13.
Original text-only exercise with fictional examples, not observed user outcomes. Official documentation supports text prompting, not the effectiveness of this exercise.
- Prefer an adult personal account. Official web lists include Hong Kong, Macau, Taiwan and Traditional Chinese. Local connections were not tested.
- Standard limits exist without a paid plan. Usage caps vary; local paid prices are unverified. No specific model or prompt count is guaranteed.
- Mobile/API/CLI are outside this check. No accounts are read, devices controlled, messages sent or purchases made. Do not supply secrets; activity-off chats may remain for 72 hours and receive safety processing.
Original source: Google: Use Gemini Apps