👉 Nondefensibility is a concept in philosophy that refers to the inability of an argument or statement to be defended as true or convincing. It is often used in discussions about arguments, counterarguments, and rebuttals. In other words, when someone argues for something, it's not enough just to say "I believe that [their position] is correct." They must also provide evidence or reason why their argument is flawed, which makes it nondefensible.