The problem is that human languages are not mathematically rigorous, so attempting to say something rigorous in a human language doesn't work. Consider a langu

The problem is that human languages are not mathematically rigorous, so attempting to say something rigorous in a human language doesn't work. Consider a language where words can express multiple ideas without specifying which idea is meant; further, where new words can be coined without formal definition. (English is one such language.) I can now pack any quantity of meaning I desire into "This sentence is a gurbell." QED. Humans are inexact, and communication can be hard.