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Applied AI / Week 02 / Try It
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Week 02 · Why It Gets Things Wrong

Try It

Try it: fact-check line by line
// Confident answers, made-up sources and our habit of trusting machines
⏱ about 15 min

Try It: Fact-Check Line by Line

Ben's school is holding a spring fair. The office sent a notice, and a parent asked a chatbot to summarize it for a class group chat.

Before it goes out, Ben is asked to check the summary.

He prints both, gets a pencil, and puts a mark next to every line. Today you will do the same.

Privacy check before any Try It
Today's task uses only the printed notice and summary below. You do not need any AI tool.
If you later check an answer from your own tool, do not paste names, addresses, account details or private records into it.
If you would not post it on a public notice board, do not paste it.

The notice and the summary

Both were written for this lesson. The summary has errors placed on purpose.

The office notice (the source)The chatbot's summary
The spring fair is on Saturday, May 9.The spring fair is on Sunday, May 9.
It runs from 10 a.m. to 1 p.m.It runs from 10 a.m. to 3 p.m.
It is in the school gym.It is in the school gym.
Entry is free for everyone.Entry has a small fee at the door.
Volunteers meet at 9 a.m.Volunteers meet at 9 a.m.
Please bring a labeled water bottle.Every family must bring snacks to share.

Your task

  1. Read the notice first, so you know what the source says.
  2. Read the summary one line at a time.
  3. For each summary line, find the matching line in the notice.
  4. Mark each summary line: matches, wrong, or added.
  5. Write a corrected summary of no more than four lines.
  6. Read your version aloud and check it once more against the notice.
Summary lineMatches the notice?
The spring fair is on Sunday, May 9.?
It runs from 10 a.m. to 3 p.m.?
It is in the school gym.?
Entry has a small fee at the door.?
Volunteers meet at 9 a.m.?
Every family must bring snacks to share.?
WHY THIS EXERCISEA summary can change a day, a time or a rule, and still read smoothly.
WHAT KIND OF ERROR?
  • Read the question.
  • Tap your answer.
"Every family must bring snacks to share" is not in the notice at all. What kind of error is it?
"Sunday, May 9" instead of "Saturday, May 9". What kind of error is it?
Write your corrected first line about the day and time.
WHY THIS EXERCISEFixing a summary means going back to the source, not to the summary.

Next week: what never to paste into an AI tool, and why children's and students' data have special protection.

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