From Wikipedia, the free encyclopedia
||This page is a candidate to be copied to the Simple English Wiktionary.
The information in this article appears to fit better in a dictionary than an encyclopedia. Wikipedia is not a dictionary, but Wiktionary is. Please make sure that this article fits the Wiktionary criteria for inclusion.
- A valid formula is one that cannot be made false, no matter how the input parameters are chosen
- A valid argument is one where the conclusion follow from the premises. If this is not the case, the argument is logically invalid.
- An argument is valid if it is true, when its premises are true.