#biconditional statements

So today in math class, we were checking our assignments on biconditional statements.  One of them was “All leopards have spots”, and then we had to write the converse in order to write a biconditional statement or counter-example.  So the converse was “If it has spots, it is a leopard”, but at the time while doing this assignment, I couldn’t think of an animal with spots except for a pink hippo with purple polka dots, so I wrote “shirts have spots”.  I asked the teacher if it would work, while unsucessfully holding in my laughter.  I could have put down cheetah.   Answer was rejected.