In Sir Arthur Conan Doyle's A Study in Scarlet, Dr. Watson is aghast that Sherlock Holmes is unaware of the solar system, something which seemingly everyone should know about. Holmes though had a reasonable explanation for his lack of knowledge. For Holmes, he could only fill his mind up with information that was directly useful to him and his line of work.

"I consider that a man's brain originally is like a little empty attic, and you have to stock it with such furniture as you choose." Holmes explained. "A fool takes in all the lumber of every sort that he comes across, so that the knowledge which might be useful to him gets crowded out, or at best is jumbled up with a lot of other things, so that he has a difficulty in laying his hands upon it. Now the skillful workman is very careful indeed as to what he takes into his brain-attic. He will have nothing but the tools which may help him in doing his work, but of these he has a large assortment, and all in the most perfect order. It is a mistake to think that that little room has elastic walls and can distend to any extent. Depend upon it there comes a time when for every addition of knowledge you forget something that you knew before. It is of the highest importance, therefore, not to have useless facts elbowing out the useful ones."

Perhaps this is also how DeMarcus Cousins thinks because when he was asked about the legendary Paul McCartney performing at the new home of the Kings, the Golden1 Center, the All-Star center was mystified at the mere mention of the musician's name.

Cousins was born in 1990, 21 years after the Beatles disbanded, so it's not like the band was in their heyday while he was growing up. However, McCartney recently worked with Kanye West, an artist Cousins has surely heard of, so his ignorance is a bit puzzling.

But again, Cousins could likely be filling his mind up with information that is solely useful for him and McCartney just simply doesn't fall under his purview. Perhaps Cousins will become familiar with McCartney when the Kings travel to Brooklyn this season to take on the Nets since the singer will likely be there trying to catch a free T-shirt.