Sherlock always has the answer, and I am always willing to suspend disbelief to follow his so-called "deductive method". Doyle presents a unique hero here - a brilliant, infallible, free-thinking gentleman, a depressed loner with a hankering for narcotics and the antagonist Moriarty at his heels. He only dims compared to the even more perfect Mycroft. Despite his cold manner, his ends/goals were always good. Don't we all sympathize with Dr. Watson who constantly visits to observe/emulate/chronicle Holmes's brilliance.