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From materials engineering to digital tools. A quiet space for making sense of things.
Naming Document Versions: The Rule Against Creating Multiple Final Versions
File Order Guessing Game Select four fictional meeting documents starting from the most recent date. If the dates a
Distinguishing between news event dates and publication dates: Checking for the recirculation of old news
Just because you received an article via message today does not mean the event happened today. Even if a recent dat
Significant figures and rounding criteria: How not to exaggerate calculation results
Just because a calculator displays a result of 69.104 does not necessarily mean the measurement result is known to
Differences between JSON and CSV: Format suitable for tables and nested data
When exporting files, you frequently encounter a screen prompting you to choose between CSV and JSON. If you simply
Writing Git commit messages: Recording the purpose of the changes and verification results
If your commit list contains only 'Modified', 'Done', and 'Final', it is difficult to know which changes to look fo
The Difference Between Press Releases and Papers: Checking the Claims, Conditions, and Evidence of Science News
You might read a science news report stating that “new technology doubled performance,” but the paper might describ
How to Verify Nobel Prize Candidate Claims: Distinguishing Between Nominator Announcements, Predictions, and Official Awards
When you see a headline like “Nominated for the Nobel Prize,” it may feel as though an official institution has rev
Reading Poll Numbers: Checking Sample Size, Sampling Error, and Confidence Interval
Looking at the survey results showing 52% in favor and 48% against, you might feel that the difference is distinct.
The Difference Between RAM and SSD: Distinguishing Between Insufficient Memory and Insufficient Storage
If a laptop specification lists 16GB RAM and 512GB SSD, can I add the two numbers together to get the total memory?
How to Read Web Addresses: Checking by Separating Domain, Path, Query, and Hash
When looking at long web addresses, it can be confusing to determine where the site name ends and the search criter
Understanding HTTP Status Codes: Check out 200, 404, and 500
HTTP Status Code Quiz: Expand Answers and Explanations Please solve each question first and then click 'Answers and
Monty Hall Quiz: Understanding Conditions and Probability for Switching Doors
Monty Hall Condition Check Quiz These are self-created learning questions. Think of the answer first, then expand e
Number Guessing Game: Narrowing the Range with UP·DOWN Hints
Guess the Number: UP & DOWN Guess an integer from 1 to 100. Enter a number and it will tell you whether it is large
Percentage Calculator: Calculate Growth Rates and Ratios Directly
Percentage Calculator Please enter 20 for 20%. Enter only numbers; do not include commas, %, or units. Each input i
Understanding Absolute References in Spreadsheets: Cells to Fix When Copying Formulas
Key point: Leave cells that should move when a formula is copied as relative references, and fix reference cells th
Mean Versus Median: Which Number to Read in Skewed Data
Calculate the mean and median yourself Enter numbers separated by commas or spaces. Up to 500 values are allowed, e
Before Downloading Public Data: Terms of Use and Update Frequency
Key point: Before obtaining public data, read the permitted uses, the actual reference date, update frequency, and
Distinguishing Ads from Organic Search Results: Labels and Landing Pages
Key point: Do not distinguish ads, organic results, and official sites solely by search position or logos. Read the
File Hashes Versus Digital Signatures: Integrity and Publisher Verification
Key point: Hashes compare byte contents with the same reference file, while digital signatures help inspect signatu
When Secrets Enter a Git Repository: Deletion Versus Key Revocation
Key point: Deleting a secret from a repository does not automatically revoke the access granted by its issued key.
Reading Nobel Chemistry Explanations: Separating Molecules, Reactions, and Applications
Nobel Chemistry explanations sometimes discuss molecular structure, reactions, and technological applications in on
Correlation Versus Causation: Questions to Ask in Science News
Suppose a science article states that students who studied longer scored higher. Saying that two quantities varied
Reading Nobel Physics Press Releases: Distinguishing Discoveries from Applications
Nobel Physics press releases present award reasons, key experiments, and potential technological uses together. Sho
Percent Versus Percentage Points: Calculating Changes in News Reports
When a rate changes from 20% to 25%, “increased by 5%” differs from “increased by 5 percentage points.” Calculation