If you are considering a major purchase or trying to write a professional “no,” AI can help with both - but only if you give it enough information to do more than produce a polished guess. This week’s two topics are practical: using AI as a research assistant before spending serious money, and using it to write a clear, courteous decline email without sounding cold or evasive. The goal is not to let AI make decisions for you. It is to help you think more carefully and communicate more cleanly.

Try at least one before Sunday. That is the whole assignment.

Use Case 1 of 2

Use Case 1: Researching a Major Purchase Decision

At 7:15 on Tuesday evening, Martin Lewis was sitting at his kitchen table with three browser tabs open and a fourth one loading slowly. He needed a new laptop for his consulting work, but the choices had become ridiculous: different processors, memory amounts, screen sizes, warranties, and discounts that seemed to disappear every few hours. Martin was 58, perfectly comfortable using email and online banking, but he did not want to spend $1,600 on a machine because a persuasive stranger called it “future-proof.” His actual needs were simple: video calls, spreadsheets, writing reports, storing photographs, and a computer that would last several years. What he lacked was not intelligence. It was a sensible way to separate requirements from advertising.

That distinction matters with any expensive purchase - an appliance, car, mattress, phone, hearing aid, camera, or home improvement. AI can organize the decision, identify questions you may not have thought to ask, and expose trade-offs. It cannot guarantee that a product will be reliable, fairly priced, or right for you. Consumer guidance recommends comparing several sources, checking seller reputations, and treating online reviews critically rather than relying on star ratings alone.

Here is the exact prompt to use:

Copy and paste this into ChatGPT or Claude:

> I am researching a major purchase and want help thinking clearly before I spend money. Do not simply recommend the most expensive or most popular option. > > The purchase is: [describe the product or service]. > > My budget is: [give a realistic maximum, including taxes, delivery, installation, accessories, maintenance, or other extra costs if relevant]. > > How I will use it: [describe your ordinary use in plain language]. > > What matters most to me, in order: [for example: reliability, ease of use, low ongoing cost, comfort, privacy, repairability, speed, appearance]. > > What I do not need: [list features you are unlikely to use]. > > My constraints are: [space, age or physical limitations, operating system, travel, noise, delivery date, learning curve, compatibility, or anything else]. > > Compare the main types of solutions, not just individual brands. Explain: > > 1. Which features are genuinely important for my use. > 2. Which features are mostly marketing or unnecessary for me. > 3. The main trade-offs between the best options. > 4. Likely ongoing costs and maintenance. > 5. Questions I should ask a salesperson or provider. > 6. Reasons I might regret each option. > 7. What information is still missing before I decide. > > If you are not certain about a price, specification, warranty, safety claim, or current model, say so clearly rather than guessing. Separate facts from assumptions. Give me a short decision checklist at the end, but do not make the final decision for me.

Why this prompt works: It gives AI the information a real adviser would need: budget, purpose, priorities, constraints, and exclusions. The request to compare solution types prevents the conversation from becoming a brand popularity contest. Asking for regret scenarios is especially useful because sales material emphasizes benefits while hiding inconvenience, subscription fees, repairs, or compatibility problems. The instruction to separate facts from assumptions also makes it easier to verify what deserves further checking.

Use Case 2 of 2

Use Case 2: Writing a Professional Decline Email

At 9:40 on Thursday morning, Denise Harper opened an email from a former colleague who wanted her to join a volunteer committee. Denise liked the person and supported the organization, but she had recently taken on responsibility for helping her husband recover from surgery. She knew she could not give the committee the time it deserved. The problem was the reply. She had already postponed answering for eight days because every draft sounded either too abrupt - “I’m unable to participate” - or too apologetic, as if she had committed some offense. Denise did not need AI to invent an excuse. She needed help saying no honestly while protecting a relationship she valued.

A professional decline email generally works best when it thanks the person, states the decision plainly, gives a brief truthful reason when appropriate, and offers an alternative only if you genuinely mean it. Clear is kinder than vague promises to “circle back” that leave someone waiting. AI is useful here because it can adjust tone and remove unnecessary explanation, but you must supply the facts and approve every sentence.

Here is the exact prompt to use:

Copy and paste this into ChatGPT or Claude:

> Help me write a professional email declining an invitation or request. > > Recipient’s name: [name]. > > My relationship with this person: [client, manager, colleague, former colleague, neighbor, association leader, etc.]. > > What they asked me to do: [describe the request]. > > My decision: I am declining. > > My honest reason, stated privately for drafting purposes: [give the real reason in plain language]. > > How much of that reason I want to disclose: [all of it / a brief general version / none of it]. > > Is there a genuine alternative I want to offer? [yes or no]. If yes, it is: [specific alternative]. > > Tone: warm, respectful, and professional - not stiff, dramatic, guilty, or overly apologetic. > > Please write: > > 1. A clear subject line. > 2. An email of 120 words or fewer. > 3. A slightly warmer alternative. > > The email must thank the person, communicate the decision unambiguously, avoid invented excuses, and avoid promises I may not keep. Do not use phrases such as “maybe later,” “I’ll try,” or “let’s stay in touch” unless the wording includes a real next step. Do not make me sound as though I am asking permission to decline. After the drafts, briefly explain any sentence that could be misunderstood.

Why this prompt works: It separates the private reason from the public explanation, which helps you remain honest without oversharing. It also tells AI what not to do: invent excuses, create false hope, or bury the decision under apologies. The word limit protects the recipient’s time, while the two versions let you choose between straightforward and warmer wording. Most importantly, the prompt makes clarity a requirement rather than an accidental byproduct.