This started with someone who wanted to take the position that "Uncle Sam" (the U.S. government) received more support from a taxpayer than the taxpayer's child did, and therefore should be claimed as a dependent. This is clearly incorrect, because the U.S. goverment ("Uncle Sam") is too old to be a "qualifying child" (unless disabled), has too much gross income to be a "qualifying relative", and also cannot be claimed as a "qualifying relative" because no one person provides more than 1/2 of its support. However, a small town could be less than 19 years old or its municipal government could both have less than $3650 in income and receive more than 1/2 of its support from one person. I did find a sentence in the instructions for the 1040 that implies that a dependent who is not a relative must be a "person". This would seem to imply a human, but corporations are "legal persons", and the Supreme Court recently ruled that they have the First Amendment rights of other persons. I would rather not give an answer that will led to silly demands to claim corporations as dependents.
What is a simply, legally valid, response to give that will prove to anyone that only a human can be claimed as a dependent?