Take all human knowledge as a whole pie. Out of that is, the experts only know 1/100 of a slice. We maybe experts in some minute context, yet there are so many

Take all human knowledge as a whole pie. Out of that is, the experts only know 1/100 of a slice. We maybe experts in some minute context, yet there are so many that know so much more when removed from that context. Or rephrased, that Person who has to deal with something 80 percent of their life knows more than the person having to deal with it 20 percent of their life.