How to check an answer in three minutes

Three minutes is a starting habit

A short check can catch many ordinary mistakes. It is not a promise that every subject can be verified in three minutes. Spend more effort when a wrong answer would have serious consequences or when the evidence is difficult to assess.

We will check this invented answer: “The town science fair is at Riverside Hall on 12 May, starts at 9:00, and costs $8. Students under 14 enter free.” Imagine using it to plan a visit.

Step 1: split the paragraph into claims

Write a small checklist: venue, date, start time, price, and the age rule. These claims can be independently wrong. The exact year matters too; an old fair page may contain nearly the same wording.

Prioritise details that affect your decision. A mistaken start time can cause you to miss the event, so checking that is more useful than polishing the paragraph's style.

Step 2: find appropriate evidence

Open the organiser's current event notice. Check the organiser, event name, date, and year before reading individual details. A search-result snippet or another chatbot answer is a lead, not the original evidence.

Suppose the notice says: “12 May, Riverside Hall, doors 9:30, entry $8, under-12s free.” The venue, day, and general price match. The opening time and age rule do not.

Step 3: compare, do not merely collect links

Notice the word doors. An opening time and a presentation start time may differ. Do not turn one into the other without evidence.

If two apparently reliable sources disagree, note their dates and seek clarification. Do not silently choose the one that matches the original answer.

Step 4: check calculations separately

If two adults pay $8 each and one eligible child enters free, admission totals $16. The multiplication is simple, but it only helps after the eligibility rule and price are correct. Also check currency, units, taxes, and whether a number describes one person or a group.

For a quotation, find the actual words in the source. For a study, check what was measured and on whom. “Associated with” is not interchangeable with “caused by”.

Step 5: write the supported version

A useful final note is: “The organiser's current notice lists Riverside Hall on 12 May, doors at 9:30, $8 admission, and free entry for under-12s.” Include the source when sharing the information. If the notice omits an end time, say that rather than guessing.

When asking the model helps

You can ask it to extract its factual claims, identify assumptions, or compare its answer with a source you provide. You still inspect the comparison. A second AI system agreeing is not necessarily independent confirmation, especially if both rely on the same incomplete source.

Complete a source comparison yourself

Use this fictional source notice: “On Saturday, the library opens from 10 a.m. to 2 p.m. Entry is free. Booking is required for the craft workshop.” An AI summary says, “The library is open all weekend, and every activity is free without booking.”

Make a small evidence table:

A supported rewrite is: “The library is open Saturday from 10 a.m. to 2 p.m. Entry is free, and the craft workshop requires booking.” It deliberately leaves Sunday and workshop prices unspecified.

With a real notice, also check who published it and whether its date covers your intended visit. An authentic old notice can be irrelevant to this Saturday. Saving the link helps someone retrace your work, but the link is useful only when the page supports the specific sentence you wrote. Evidence checking is a comparison between a claim and a source, not a contest to collect the most links.

Your stopping rule

For an ordinary planning task, stop when the decision-relevant claims have suitable support and important uncertainties are visible. For consequential decisions, use the appropriate qualified people or authoritative sources. The habit is not “distrust everything”; it is “know what supports the part I am relying on”.