FATHER, MOTHER, and a few other genealogical words (DAD, MOM, POP, MA, PA, GRANDFATHER, GRANDMOTHER, etc.) have the unusual property of generating sentences that are true or false, depending on the number of words used and how they are read.
Word Ways: Vol. 19
, Article 16.
Available at: http://digitalcommons.butler.edu/wordways/vol19/iss4/16