Unlimited talk, text & web $50 /mo
First 100 MB at up to 4G speeds
- Great phone selection
- America’s Largest 4G Network®
- No annual contract
Principle of bivalence - Wikipedia, the free encyclopedia
The principle of bivalence is related to the law of excluded middle though the latter is a syntactic expression of the language of a logic of the form "P ? ¬P".
http://en.wikipedia.org/wiki/Principle_of_bivalence