Questions are the mind's immune system 🧠✖️❔ Great philosophers and thinkers | Quotes and meanings | Daily training | See a little clearer every day
Scotland, United Kingdom
Joined October 2026
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A mind that questions itself is harder to fool.
One case a day: a claim, a hidden trick, and you.
Link in bio.
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New on CritThinker: Trickle, a short mystery every day.
You arrive with almost no clues, and Dr Fallacy has already jumped to an answer. Look, ask, and test what else could be true before you decide.
A few minutes, no account. Today: The Cold Bedroom.
critthinker.com
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“Custom, then, is the great guide of human life.”
– David Hume
What do you think they meant? 🧠✖️❔
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“The art of being wise is the art of knowing what to overlook.”
– William James
What do you think he meant? 🧠✖️❔
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A true belief and a mistaken one can feel exactly the same from the inside.
So what, other than the feeling, tells you which one you're holding? 🧠✖️❔
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“Extraordinary claims require extraordinary evidence.”
– Carl Sagan
What do you think they meant? 🧠✖️❔
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Pennycook et al., Nature 2021: a headline's truth barely changed what people said they'd share, though most said accuracy mattered.
Asking them to rate one headline's accuracy first improved what they shared next, on Twitter too.
That pause is what CritThinker trains. 🧠✖️❔
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“Whenever a published fact, a new observation or thought came across me, which was opposed to my general results, to make a memorandum of it without fail and at once.”
– Charles Darwin
What do you think he meant? 🧠✖️❔
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We can but show them how and soar with grace, then it’s for them to test their wings and fly only they know how.
What do you think this means?
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"I will use a cumbersome abbreviation for it: WYSIATI, which stands for what you see is all there is."
– Daniel Kahneman
What do you think he meant? 🧠✖️❔
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Survivorship bias: drawing a lesson from the successes you can see, while the failures stay invisible.
A feed full of people who quit and thrived won't show the people who quit and didn't.
What would change if the quiet failures were as easy to see as the loud wins?
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A little CritThinker habit for an energetic mind.
Stuck for ideas? Take a short walk. Stanford research found people came up with about 60% more creative ideas walking than sitting — for brainstorming, not for single-answer puzzles.
Try it once today.
critthinker.com
“It is futile to do with more what can be done with fewer.”
– William of Ockham
What do you think he meant?
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What if consciousness and intelligence are one?
Maybe all the brain does is mimic nature's own repeating cycles of trial and change, the ones that help life survive and thrive. And the intelligence threaded through us is what we know as consciousness.
So is consciousness woven into the fabric of existence, like a universal code? And all it needed were the right ingredients and conditions to come alive as what we call life?
Whatever the answer, if one exists, it's a gift to have the curiosity to ponder such wonders and the intelligence to reason through them.
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"Do not compare, do not measure." Attributed to Carl Jung.
Yet we also compare to learn, to improve and to choose well.
Is it the comparing, or what we do with it?
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"What is truth? said jesting Pilate, and would not stay for an answer."
– Francis Bacon
What do you think he meant?
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"Extraordinary claims require extraordinary evidence."
— Carl Sagan, Cosmos (1980)
Worth remembering in the age of AI. A confident, fluent answer isn't the same as a true one, whether it comes from a person, a headline or a chatbot. The bigger the claim, the more it's worth checking.
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