We know that Sherlock Holmes's most famous saying is: "When you have eliminated all the impossible factors, what remains, no matter how incredible, must be true."

In fact, this sentence is also very instructive for our daily thinking and judgment. Conan Doyle's "A Study in Scarlet" is the first detective novel with Sherlock Holmes as the protagonist. The author Conan Doyle originally aspired to become a doctor, but he had a literary dream since he was a child. Therefore, when a doctor encountered Writers, detective novels have blossomed in the professional field. This is the birth history of the Sherlock Holmes series that we are familiar with.

At the same time, let’s take a look at Holmes’ daily investigation methods, which can basically be divided into three steps:

The first step is to collect enough information;

The second step is to deduce all possibilities based on the known information;

The third step is to act accordingly to get more information and eliminate some possibilities.

So, if you want to learn Sherlock Holmes’s meticulous investigation methods, you can start with these three steps of his. Because the reason why Holmes became a detective is that all his reasoning is based on this basic three-step deductive reasoning.