Abstract
Wasps are the first invertebrates to pass a logic test. Remember the "transitive property" from high school math class? "If A is greater than B and B is greater than C, then A is greater than C." Once, we've thought only humans could use deductive logic, but later we learned that many vertebrates (creatures with backbones) can perform these feats to some degree. Now we can add lowly wasps to the list.