While appealing, these layman 's versions of the paradox share a drawback: an easy refutation of the barber paradox seems to be that such a barber does not exist, or that the barber is a woman and therefore doesn't shave. The whole point of Russell's paradox is that the answer "such a set does not exist" means the definition of the notion of set within a given theory is unsatisfactory. Note the difference between the statements "such a set does not exist" and "it is an empty set ". It is like the difference between saying, "There is no bucket", and saying, "The bucket is empty".
You may fortunately never have to spend six months in the NICU like I did, but if you’re in business long enough, something in your life will compel you to step away from your company for a time, and you want to make sure that you’re building a strong business that can allow you to do just that. After all, you built a business to give you more freedom, not less. Without these four types of dogs in your business, you will never be able to step away from it. And, if you can't step away from it, then what you have is a job, not a business.