🔬Understand Falsifiability: Popper's Big Idea
Learn Karl Popper's falsifiability test — the one-minute filter that separates real claims from unfalsifiable ones — then prove you can use it by rewriting a vague claim into something the world could actually disprove.
Phase 1Why Popper Threw Out Verification
Meet Popper and the puzzle that broke verification.
Confirming evidence isn't proof — it might be the problem
7 minConfirming evidence isn't proof — it might be the problem
The line between science and not-science isn't truth — it's testability
7 minThe line between science and not-science isn't truth — it's testability
Good theories make bets that could lose
7 minGood theories make bets that could lose
Unproven and unfalsifiable are not the same thing
8 minUnproven and unfalsifiable are not the same thing
Phase 2The One-Minute Falsifiability Test
Classify real claims as falsifiable or not, daily.
Ask 'what would prove this wrong?' — that's the whole test
6 minAsk 'what would prove this wrong?' — that's the whole test
Vague language is how unfalsifiable claims pass for science
7 minVague language is how unfalsifiable claims pass for science
How a falsifiable theory turns unfalsifiable — one excuse at a time
7 minHow a falsifiable theory turns unfalsifiable — one excuse at a time
Apply the test to yourself before applying it to others
8 minApply the test to yourself before applying it to others
Sort five claims a day — and the test starts running automatically
6 minSort five claims a day — and the test starts running automatically
Phase 3Falsifiability in the Wild
Apply the test to astrology, evolution, and string theory.
Your horoscope says something — but does it forbid anything?
7 minYour horoscope says something — but does it forbid anything?
A theory creationists call 'unfalsifiable' is one of the most falsifiable in biology
7 minA theory creationists call 'unfalsifiable' is one of the most falsifiable in biology
When a real theory makes predictions no instrument can test, is it still science?
8 minWhen a real theory makes predictions no instrument can test, is it still science?
Conspiracy theories don't fail because they're absurd — they fail because they can't
8 minConspiracy theories don't fail because they're absurd — they fail because they can't
Phase 4Rewrite a Claim So Reality Can Bite It
Rewrite one vague claim into a testable, falsifiable one.
Take a vague claim and rewrite it until reality can disprove it
8 minTake a vague claim and rewrite it until reality can disprove it
Frequently asked questions
- What's the difference between unproven and unfalsifiable?
- This is covered in the “Understand Falsifiability: Popper's Big Idea” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- Is evolution falsifiable?
- This is covered in the “Understand Falsifiability: Popper's Big Idea” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- Why isn't string theory considered falsifiable by some physicists?
- This is covered in the “Understand Falsifiability: Popper's Big Idea” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- Does falsifiability mean a theory has to be false?
- This is covered in the “Understand Falsifiability: Popper's Big Idea” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- How do I rewrite a vague claim to make it falsifiable?
- This is covered in the “Understand Falsifiability: Popper's Big Idea” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
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