 Since Heidegger thinks that animals do not experience nothingness, he is committed to skepticism about animal reasoning involving negation. Consider the Stoic example of a dog that is following a trail. The dog reaches a fork in the road, sniffs at one road and then, without a further sniff, proceeds down the only remaining road. The Stoics took this as evidence that the dog has performed a disjunctive syllogism: “Either my quarry went down this road or that road. Sniff—he did not go down this road. Therefore, he went down that road.” Heidegger must discount this as anthropomorphism.