Every week brings a new tool that promises to save time, sharpen your thinking or change your career. Some deliver. Many do not. Learning to tell the difference is now an everyday life skill, and one of the best teachers is physicist Richard Feynman, who spent his career asking one blunt question: how do we know this is true?
This guide turns his habits into a practical checklist for evaluating technology claims, whether they come from an advertisement, a coworker or your own excitement. It takes about ten minutes per decision and can save you months of wasted effort.
Why Technology Claims Deserve a Second Look
New products are sold with stories: faster, smarter, effortless. Stories spread easily because they are short and hopeful. Evidence is slower, messier and usually less exciting. When you adopt a tool because of the story, you may find out later that it fit someone else's life, not yours.
This is not a reason to distrust all technology. It is a reason to separate three things: what the product claims, what has actually been observed, and what you personally need. Keeping those apart is the heart of the method below.
We shape our tools and thereafter our tools shape us. — Marshall McLuhan
Tools quietly change habits, attention and expectations. Before adding one, picture the version of your day that exists six months after you start using it, not just the first exciting week.
Step 1: Start With Honesty About Yourself
Most bad technology decisions begin with wanting something to be true. A gadget that promises focus appeals to a distracted person; a service that promises income appeals to someone short on money. Excitement is a signal to slow down, not speed up.
Write down in one sentence what problem you want solved and what you hope the tool will do. This gives you a fixed target, so you cannot move the goalposts after you have paid.
The first principle is that you must not fool yourself — and you are the easiest person to fool. — Richard Feynman
Feynman gave this advice in his 1974 Caltech address on scientific integrity. In practice, notice your hopes first. If you badly want a purchase to be good, apply extra scrutiny and ask a skeptical friend to look at your reasoning.
Step 2: Leave Room for Doubt
Doubt is often treated as negativity, but it is closer to curiosity with discipline. A doubting person asks what would change their mind. A certain person stops looking. When a tool is described with absolute language such as always, never or guaranteed, treat that language as a prompt for questions.
- What is the claim, exactly? Restate it in plain words with numbers if any are given.
- Who says so? A maker, a reviewer with a financial stake, or someone with nothing to gain?
- What would prove it wrong? If nothing could, the claim is marketing, not information.
We absolutely must leave room for doubt or there is no progress and no learning. — Richard Feynman
Doubt keeps you learning after you have bought in. Schedule a review date, perhaps thirty days out, when you will ask whether the tool has done what you hoped, and be willing to stop using it.
Step 3: Weigh the Good and the Bad Equally
It is natural to list benefits when you like something and drawbacks when you do not. A fair evaluation requires both lists, written at the same length and with the same effort. Include costs that are easy to overlook: subscription fees, learning time, data you hand over, and the habits the tool may replace.
Try a simple table on paper. Left column: what I gain. Right column: what I give up. If the right column is hard to fill, you have probably not researched enough.
If you have a theory, you must try to explain what's good and what's bad about it equally. — Richard Feynman
From his reflections on the Challenger inquiry, this is a standard you can borrow for shopping, hiring or choosing software. Give the idea you dislike the same fair hearing as the one you favor.
Step 4: Let Reality Outrank the Pitch
The strongest test of any technology is whether it works under your real conditions: your internet connection, your schedule, your patience on a bad day. A demo is a performance. Your actual week is the experiment.
Run a small trial before committing. Use the tool for two weeks on one real task, record the time or money it saved, and compare it to your old method. If you cannot measure a difference, the benefit may be imagined.
For a successful technology, reality must take precedence over public relations, for nature cannot be fooled. — Richard Feynman
Feynman wrote this about the Challenger disaster, where confident reassurance met hard engineering facts. For personal choices, trust your logged results over a sleek presentation.
Step 5: Decide Who Is Responsible for the Use
A tool does not carry its own ethics. A messaging app can connect families or drain evenings; an AI assistant can speed up drafts or replace the thinking you need to practice. The outcome depends on rules you set.
Decide in advance how, when and for what you will use the tool, and where you will not. Write two or three simple rules, such as no devices at dinner, or always checking an automated answer against a primary source.
Scientific knowledge is an enabling power to do either good or bad — but it does not carry instructions on how to use it. — Richard Feynman
Feynman spoke these words in 1955 about the value of science. The same logic covers every gadget in your pocket: the instructions for using it well have to come from you.
Step 6: Keep the Future Open
Good technology choices keep options available. Prefer tools that let you export your data, cancel easily and work alongside other systems. Avoid arrangements that make leaving costly, because your needs will change.
This also applies to what you build for others. Label files clearly, keep notes about how things work, and avoid clever shortcuts that only you understand.
It is our responsibility to leave the people of the future a free hand. — Richard Feynman
Though he meant knowledge and scientific conclusions, the idea translates well to digital life: leave the next person, including your future self, the freedom to change course.
A Ten-Minute Checklist You Can Reuse
- Write the problem in one sentence.
- Note how much you want the answer to be yes.
- Restate the claim in plain words and find who benefits from it.
- List gains and costs at equal length.
- Run a two-week trial on a real task and measure the result.
- Set two or three personal rules for use.
- Confirm you can leave easily, and set a review date.
Common Mistakes to Avoid
The first is trusting popularity. Many people using something shows it is attractive, not that it works for your needs. The second is the sunk-cost trap: staying with a tool because you paid for it. The third is skipping the review date, which lets a trial quietly become a permanent habit without a decision ever being made.
A fourth mistake is the opposite error: refusing every new tool out of reflex. Skepticism is meant to sort good from bad, not to block progress. Feynman was no enemy of technology; he loved building and tinkering. He simply insisted on evidence.
Putting It Into Practice This Week
Pick one tool or subscription you already use and run the checklist on it. You may keep it with confidence, trim how you use it, or cancel it. Any of those results is a win, because you made the choice deliberately instead of by default.
Then apply the same method the next time someone shows you a new gadget at work. Ask your three questions calmly, and offer to test it together. Teams that evaluate tools this way waste less money and adopt better ones.