Image: Photo: Charles J. Sharp. A black swan (Cygnus atratus) on Bruny Island, Tasmania (2023) · CC BY-SA 4.0
A Knaph story
The Story of the Counterexample
How one case learned to break an "all"
c. 375 BCE – 1988
A mad friend, a plucked chicken, three black swans and one stubborn number. How people learned that a single case can break a claim, however many cases agree with it.
A Knaph story
The Story of the Counterexample
How one case learned to break an "all"
c. 375 BCE – 1988
A mad friend, a plucked chicken, three black swans and one stubborn number. How people learned that a single case can break a claim, however many cases agree with it.