In Sheldon's mind, he believes that everything he says is perfectly acceptable, because he has deduced that it is right. He perceives himself as relying on his intelligence to be objective, however, his social incompetence makes him out of sync with the rest of the world.
While I was taking a walk in my neighbourhood, I noticed a tabloid newspaper machine at the end of my block. Two things stuck out. The first was that there never used to be a newspaper machine on that corner. And the second thing was that the newspaper was for free.
For a lot of people, turning thirty can be a difficult experience. However, I believe that being thirty years old in this present day has an unprecedented benefit in the history of our existence.