# You Can't Say Anything Without Experiencing It Because you can't get tacit knowledge without an experience. Explicit knowledge is limited by the limit of language. And the limit is quite tight. I'm not saying that you can't judge a serial killer without having an experience of killing people. But I think that you can't truly understand the serial killer without having a similar experience. This is also related to the problem of centralisation / central planning as Hayek wrote. Bureaucrats can't use tacit knowledge when making a decision.