Answer: if it is a square, then it is a quadrilateral.
Explanation:
1) A conditional is a statement of the kind p --> q.
2) That is read if p then q, and it means that whenever the condition p (named antecedent) is verified then the condition q (named consequent) is necessarily met.
3) OtheR way to say it is that the condition p is sufficient to state the condition q, but not necessary..
4) That is what the Venn diagram is showving: since the set squares is entirely inside the set quadrilaterals, therefore it is sufficient to state that a figure is a square to conclude that it is a quadrilateral, but it is not necessary, as there are other regions outside the set of squares which are inside the set of quadrilateras, this is: if it is a square, then it is a quadrilateral.
