Wirebook › Bonus lesson
Who stole all the emojis?
Overnight, every emoji vanished from a pretend Byte Bakery group chat. The message used to say Party tonight 🍕🎉🐱. This morning it says Party tonight pizza with a trail of tiny marks that look a lot like paw prints. Four suspects. One innocent cat. Put on your detective hat.
What each suspect really does
- Spam filter. A program that sorts junk mail and sometimes sanitises (cleans) HTML. It usually moves whole messages to a junk folder, or strips scripts and odd markup. It does not tiptoe through a chat nibbling one pizza at a time — but a clumsy cleaner can delete emoji characters it does not recognise.
- Virus / malware. Harmful software can delete or scramble whole files. If a virus had “eaten” the chat, the whole note would be gone or garbage — not a tidy word swap with leftover punctuation.
- Autocorrect. Tries to fix spelling as you type. Sometimes it replaces an emoji with a plain word, or “corrects” a name into something else. Helpful… until it isn’t.
- A cat on the keyboard. Can mash keys, select-all, or send a half-finished message. It does not carefully turn a pizza picture into the English word “pizza” and plant soft hyphens that look like paws.
It's a bit like… blaming the dog for empty biscuit crumbs when a sibling swapped the biscuits for a note that said “biscuits” and sprinkled flour paw prints on the table. The prints look guilty. The swap tells the real story.
Building apps? Grown-up twins on Tooltern: emoji shows as a box, mojibake gibberish, invisible zero-width characters. For a JSON character X-ray, try Anvil’s free /v1/text/inspect. Related Wirebook lessons: vanishing emojis (numbers and UTF-8), ghost footprints, spotting fakes, bots & crawlers.