No, watermelon is not a false fruit. It is a true fruit. This means it develops from the fertilized ovary of a flower.
The confusion arises from the fact that some fruits, like apples and strawberries, are classified as false fruits. These fruits develop from the fertilized ovary alongside other parts of the flower, such as the receptacle. However, watermelons are not part of this category.
While the outer rind of a watermelon may seem like it could be a part of the flower structure, the edible flesh is actually the ovary itself. The seeds inside are the watermelon's true fruit, meaning they are the part that contains the fertilized ovules.