But logic tells us that in English, ’s attached to a noun signals possession: the dog’s dish, the cat’s toy, the lexicographer’s cry. So if English is logical, and there are simple rules to follow, why doesn’t “it’s” signal possession? We know that ’s also signals a contraction, but we don’t have any problems with differentiating between “the dog’s dish” and “the dog’s sleeping”—why should we suddenly have problems with “it’s dish” and “it’s sleeping”?