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Find invalid merge fields in five macros

  • For Customer support teams
  • You practice Catching mistakes and made-up facts
  • Time about 5 minutes
  • Level Intermediate

About this exercise

The only valid merge fields are {{first_name}}, {{order_id}} and {{agent_name}}, exactly as written (lowercase, no spaces). Output a table with the header "Macro | Invalid fields" and five rows M1 to M5, listing each invalid field exactly as it appears or "none", then a last line "Fix: M#, M#". Plain text, under 60 words.

Common mistakes when you ask AI for this

  • Missing the spaced field. The AI passes {{ order_id }} because it looks right. Try: Say: "No spaces inside the braces."
  • Ignoring case. The AI passes {{First_name}}. Try: Say: "Field names are case-sensitive."
  • Missing the summary line. The AI stops at the table. Try: Give the last-line format.
  • Getting markdown back. AI adds bold and headings by default, which show up as stray symbols where this is pasted. Try: Say "plain text, no bold, no headings, no asterisks".
  • Trusting the AI to count words. AI is bad at counting and usually runs long, so a vague "keep it short" lands well over the limit. Try: Cap each part instead of the total, for example "each line under 15 words".

What a strong prompt includes

  • Gives the header
  • Lists the valid fields
  • States case and spacing rules
  • Asks for plain text
  • Sets a length limit

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