Define the words only you understand.

Some words in your prompt only mean something to you. If the AI doesn't understand what you mean, define your terms in the prompt, because "short," "casual," and "the usual" carry a picture in your head and nothing in the model's.

Prompt Fluency is communicating so the model doesn't have to guess. Fuzzy words are a guessing burden hiding in plain sight. You read them and see one exact thing. The model reads them and sees a thousand reasonable things. It picks the average one.

Try this ask:

"Write a short, casual notice for the pool gate about the new guest rule."

You get four friendly paragraphs with a sun emoji and a line about "making memories this summer." To the model, that is short and casual. To you, short meant two lines a parent can read while holding a toddler and a cooler. Casual meant not bossy. It did not mean cute.

The model didn't ignore you. It followed your words. Your words just didn't carry your meaning.

Same break shows up everywhere.

"Send the dog-walking clients the usual reminder."

"Make the food truck specials board simple."

"Write a beginner-friendly intro for the chess club newsletter."

The usual. Simple. Beginner-friendly. Every one of those has a real definition. It lives in your head, your last three months, your customers. The model has none of that. So it fills the word with the most common meaning it has seen.

Define the word right where you use it. Plain English. One line.

"Write a short, casual notice for the pool gate about the new guest rule. Short means two lines, under 25 words. Casual means friendly but not cute. No emoji, no exclamation points. The rule: two guests per household, and a member has to be with them."

"Send the dog-walking clients the usual reminder. The usual means: day and time of the walk, a note that I'll text when I pick up, and a reminder to leave the leash by the door. Three sentences. Sign it with just my first name."

"Make the food truck specials board simple. Simple means three items max, name and price only, no descriptions. Everything has to be readable from the curb."

"Write a beginner-friendly intro for the chess club newsletter. Beginner-friendly means someone who knows how the pieces move but has never played a timed game. Don't explain the rules. Do explain what 'blitz' means, and that nobody gets laughed at for losing fast."

Look at what changed. Same job. Same word. But now the word has a fence around it. The model doesn't have to guess what "short" is. You told it.

No shame here. I do this too. You use a word for so long that it stops feeling like a choice. "The usual" feels like a fact because you've done it fifty times. It's only a fact to you.

A quick check before you hit send:

Words that need a definition

• Size words: short, long, brief, detailed
• Tone words: casual, professional, friendly, fun
• Habit words: the usual, like last time, the normal way
• Audience words: beginner, simple, for everyone
• If you'd explain the word to a new helper on their first day, explain it to the model

When the answer comes back close but wrong, look for the fuzzy word. Odds are the model met it and picked a meaning. Define it. Ask again.

You're not overexplaining. You're removing the need to guess. That's Applied Intelligence Mastery in practice: say what your words mean, so the model works from your picture instead of the average one.