Example 1
Mouse over the buttons to see the Venn diagram representation of the associated statements.


No fossil can be crossed in love.
Some who may be crossed in love are oysters.
The combined Venn diagram.


Try to determine if the conclusion

some oysters are not fossils

is contained in the combined Venn diagram and then check your answer.

If the conclusion is contained in the combined Venn diagram, then the conclusion is valid.

If the conclusion is not contained in the combined Venn diagram, then the conclusion is not valid.