Pot, meet kettle... And maybe, just maybe, I work by myself, therefore am able to carry a phone with me throughout the day, and by doing so am on it more than a laptop? And since it is easier to catch mistakes on a computer rather than a phone, maybe (just maybe), I generally don't notice a typo on my phone until after the five minute editing period has passed? Maybe, just maybe, you should learn before you speak, since you don't know a person's personal life. You know what happens when you assume. If for whatever reason you don't, just break the word assume into three parts.