Ximpledu

Counterexample

See how to find the counterexample of the given statement.
2 examples and their solutions.

Counterexample

Definition

Counterexample
False!
Statement
A counterexample is an example
that makes a statement false.
Only one counterexample is needed
to show that the statement is false.

Example

If x is a prime number,
then x is an odd number.

Counterexample?
Solution

Example

A triangle can be formed by three points.

Counterexample?
Solution