Haldane guesses that a dog would probably be able to place the acids in the order of their molecular weights by their smells, just as a man could place a number of piano wires in the order of their lengths by means of their notes.
Haldanas spėja, kad šuo greičiausiai sugeba pagal kvapą išdėlioti rūgštis molekulinio svorio tvarka, taip, kaip žmogus gali sudėlioti pianino stygas pagal jų ilgį naudodamas natas.