“A Dog's Tale” encapsulates the duality that the domesticated dog as both loyal “friend” and dependable scientific “instrument” denotes. Twain paints a dark portrait of man's association with “beast.” Additionally, the story presents much more than a simple anthropomorphic tale. Although the nonhuman narrator has humanlike characteristics, one is always aware that Aileen Mavourneen is a dog. Nowhere is this divide more apparent than in the narrator's failed attempts to “understand” the language and behavior of the human characters. The tale epitomizes the dogma of man's rule over “lower” creatures, but it does not fully reaffirm these accepted beliefs. Rather, the story problematizes our position relative to these “lower creatures,” most notably through the inconsistencies between language, interpretation, and physical response; the story also forces readers to confront the inconsistent treatment of “man's best friend” as well as humanity's privileged locus as reasoning animals.