If the four sides of quadrilateral are congruent, then the shape is a square.
\Hypothesis: If the four sides of quadrilateral are congruent.
\The hypothesis is true.
\Conclusion: then the shape is a square.
\The conclusion is not true.
\The statement is false.
\Counter example:
\The four sides of quadrilateral are congruent, then it can be rhombus.
\The statement is false.
\The four sides of quadrilateral are congruent, then it can be rhombus.