Res cogitans

What the Latins (and Enlightenment French, come to think of it) called a derivative: things that exist only in the mind; hypotheticals; as opposed to the physical hard stuff you stub your toe on when you are in the real word. That’s res extensa.

• Cash brokerage: res extensa.
• Contracts for difference: res cogitans.

See also

• Res extensa
• René Descartes