A juicy Latinism that hails not from the dusty halls of nineteenth century jurisprudence but the even dustier ones of seventeenth century metaphysics. Res extensa is — per Des Carter, stuff that’s out there in the world, the existence of which depends on your frail perceptual apparatus, and may be contrasted with res cogitans — stuff that is only in your head, such as famously, your knowledge of your own existence. that can't be subject to doubt because it needs to be true for you to doubt in the first place NOW GET ON WITH YOUR WORK AND STOP TRYING TO DISTRACT ME BLENKINSOP MINOR