- Donald is a census-designated place and unincorporated community in Yakima County, Washington, United States. As of the 2020 census, Donald had a population of 172.
- René Descartes (Wikiquote)
René Descartes (March 31, 1596 – February 11, 1650) was a highly influential French philosopher, mathematician, physicist and writer. He is known for his influential arguments for substance dualism, where mind and body are considered to have distinct essences, one being characterized by thought, the other by spatial extension. He has been dubbed the “Father of Modern Philosophy” and the “Father of Modern Mathematics.” He is also known as Cartesius.