Formal System Based On The Sheffer Stroke
The following is an example of a formal system based entirely on the Sheffer stroke, yet having the functional expressiveness of the propositional logic:
Read more about this topic: Sheffer Stroke
Famous quotes containing the words formal, system, based and/or stroke:
“That anger can be expressed through words and non-destructive activities; that promises are intended to be kept; that cleanliness and good eating habits are aspects of self-esteem; that compassion is an attribute to be prized—all these lessons are ones children can learn far more readily through the living example of their parents than they ever can through formal instruction.”
—Fred Rogers (20th century)
“Delight at having understood a very abstract and obscure system leads most people to believe in the truth of what it demonstrates.”
—G.C. (Georg Christoph)
“Foster the labor of our country by an undeviating metallic currency ... always recollecting that if labor is depressed neither commerce nor manufactures can flourish, as they are both based upon the production of labor, produced from the earth, or the mineral world.”
—Andrew Jackson (1767–1845)
“The five kings count the dead but do not soften
The crusted wound nor stroke the brow;
A hand rules pity as a hand rules heaven;
Hands have no tears to flow.”
—Dylan Thomas (1914–1953)