4. If some of Tucson's residents have blue eyes and some of Tucson's residents are children, is the statement "Some of Tucson's residents are blue eyed children" true, false, or unsubstantiated?

Answer: unsubstantiated.

This is, the statement "Some of Tucson's residents are blue eyed children" cannot be inferred from the two original statements.

Because the subset of "Tucson's residents that have blue eyes" and the subset of "Tucson's residents that are children" might or might not have common elements.