“Afghanistan or Iran?” That is the first question Sherlock Holmes asks Dr. Watson, when they meet for the first time. It all begins when Watson is walking through a park when an old friend sees him. They sat for a while and talk about his military life and his need for a roommate. This moment is when Watson first hears about Sherlock, someone who is also looking for a roommate. That afternoon, they meet in a chemistry lab and when Sherlock sees him, he already knows who Watson is. This leaves Dr. Watson startle and wondering how this stranger knows something about his life.
Furthermore, this stranger is Sherlock Holmes a consultant detective in London. After moving in together, they solve crimes with his intelligence, deduction and observation
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One example is when they are in a cab and Sherlock explains Watson what he saw in order to conclude details about his life. First, his haircut and the way he stands, says military. His face is tan, but not beneath the wrist, so it means he was not in vacations. He limbs a lot, but when he is standing it stops, so it is psychosomatic injury. Then, with the phone, he deduces Watson has a rich brother that is an alcoholic, with the scars near the charger, and in a divorce, because it has a romantic engraving. Another example is when he examines a crime scene, where a woman in pink is the victim. Firstly, by seeing her fingernails chipped he realizes she is left-handed. He thinks her name is Rachel, from letters marked in the floor. Also he begins observing her jewelry, noticing which of them are clean. All of them are, except her wedding ring, from which he deduces she has an unhappy marriage. The last example is in the story, when Sherlock explains how he deduces it was a cab and not a carriage. He begins by examining the roadway and he sees some marks. He notices they are wheels of a cab, by the narrow gauge of them which are less wide than the ones in a carriage These reiterates the importance of observation in Sherlock’s