Additional Uses. 1  Keep a big bag of kitty litter in the back of your car to add weight and for added traction if you get stuck. 2  Pouring litter down mole holes is a kind way to send them packing! 3  Add a layer of litter to the bottom of your outdoor grill to prevent grease fires.
The law of non-contradiction is found in ancient Indian logic as a meta-rule in the Shrauta Sutras, the grammar of PÄá¹ini, and the Brahma Sutras attributed to Vyasa. It was later elaborated on by medieval commentators such as Madhvacharya.
In proof by contradiction (also known as reductio ad absurdum, Latin for by reduction to the absurd), it is shown that if some statement were true, a logical contradiction occurs, hence the statement must be false. A famous example of proof by contradiction shows that is an irrational number :