Mycroft Holmes is a character in the stories written by Arthur Conan Doyle. He is the elder brother (by seven years) of the famous detective Sherlock Holmes.
Possessing inductive powers exceeding even those of his younger brother, Mycroft is nevertheless incapable of performing detective work similar to that of Sherlock as he is unwilling to put in the physical effort necessary to bring cases to their conclusions.

...he has no ambition and no energy. He will not even go out of his way to verify his own solutions, and would rather be considered wrong than take the trouble to prove himself right....