A core idea in deriving allomorphy in Distributed Morphology is underspecification. Verbal agreement in the present tense in English takes the form /-s/ in the 3rd person singular (‘ex. John eats bologna’), and /Ø/ in all other cases (‘I eat bologna;’ ‘They eat bologna’). The phonological exponents of the feature bundle terminal nodes in the syntactic tree are listed in the Exponent List. We can capture the fact that /-s/ has a much smaller distribution than /Ø/ using the following entries in the Exponent List: