Belief and Reasoning Biases
Post hoc fallacy
Assuming that because B followed A, A caused B.
What Is Post hoc fallacy?
Post hoc fallacy is a thinking trap where assuming that because B followed A, A caused B.
How It Tricks You
It can make a conclusion feel proven because it fits what already seems true.
Real-World Example
A headache improves after tea, so the tea gets all the credit.
Seen Online As
- The fast interpretation is doing more work than the evidence.
- The claim feels obvious before the check question is asked.
- A shortcut is making the judgment feel more certain than it is.
What To Ask Instead
Is timing the only evidence?
Related Thinking Traps
Common Situations
Quick FAQ
What is Post hoc fallacy?
Assuming that because B followed A, A caused B.
What is an example of Post hoc fallacy?
A headache improves after tea, so the tea gets all the credit.
How do I spot Post hoc fallacy?
Is timing the only evidence?