Question

All snakes are poisonous. how can i find the counterexaple of this

Answer 1

All snakes are poisonous.
Negation: There exists at least one snake that is not poisonous.
or: There exists one snake that is not poisonous.
or: There exists a snake that is not poisonous.
or: Some snakes are not poisonous.

Answer 2

There exists one snake that is not poisonous i believe :)

Answer 3

You can look on google to look for any kind of poisonous kind of insect or snake or frog or other kind of stuff