Holistic Detective that stars in two of Douglas Adams' books, Dirk Gently's Holistic Detective Agency and The Long Dark Teatime of the Soul, as well as in the recently published unfinished book The Salmon of Doubt.

His holism means that absolutely everything has to do with absolutely everything, and thus it is entirely justified to go to Hawaii to find some old lady's lost kitten, and bill the expenses.

Also improved an old method of Sherlock Holmes, who would say something like "if you disregard everything that is impossible, whatever is left, no matter how improbable, must be the answer."

Gently argued that Sherlock had it backwards; the explanations that seemed very improbable, well, they're just really improbable. While the impossible is merely something we don't understand yet.

So when something inexplicable happens on Hawaii, Dirk will assume it's an Act of God, goes to find the Gods in Valhalla, and finds the lost kitten.

(These aren't actual spoilers since it's years since I read the books and those examples are more or less made up)