Mark McDonald
Mark McDonaldThoughts on ethics, self-improvement, and whatever else I'm interested in this week.
| Platform |  | Pricing | Only free issues | Publishes | Weekly |
|---|---|---|---|---|---|
| Issues | 52 | Subscribers | Read | markmcdonaldthoughts.substack.com |
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Latest Issues
Recent posts by this newsletter. Browse the email archive.
The paradox of overlearning
Who’s the better driver, someone with 4 years of experience or 40? I’d guess that it’s about the same. After the first few years, driving habits become automatic and improvement essentially stops. Most drivers aren’t getting better with eac...
Why I don’t switch doors in the Monty Hall problem
Marilyn vos Savant once held the Guinness World Record for highest IQ score, until the category was discontinued in 1989. She put that reputation to work by writing a weekly magazine column where she answered readers’ questions and solved p...
21 things you probably didn’t know (February 2026)
Find previous lists here, here, and here.
No such thing as a free lunch?
In college I remember reading this story about a student who went his entire freshman year without paying for food. He would forage for fruits, nuts, and edible plants, get free food from campus events, and eat leftovers from his roommates....
Authors
The writers behind this newsletter.
Thoughts on ethics, self-improvement, and whatever else I'm interested in this week.
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