When two pronouns are used in a sentence, all the sentences remain grammatically valid but the ambiguity of precisely telling the subject and the object of the sentence remains. However, just as we did above, converting one the pronoun into nominative case does not work for all pronouns but only for the 3rd person pronouns and doing that for any other pronoun will leave the sentence ungrammatical and without sense. The reason that this works only for the 3rd person pronoun because these are not really the "regular" 3rd person pronouns but are instead the demonstrative pronouns. Hindustani lacks the regular 3rd person pronouns and hence compensates for them by using the demonstrative pronouns.