1. A detective should always explore whether there is a second possibility and guard against it. This is the first principle of investigating crimes.

It is very wrong to confuse abnormal things with mystery.

It is the biggest mistake to speculate before you get these facts. Some people unconsciously use far-fetched facts to adapt to theory, instead of using theory to adapt to facts.

Nothing can confuse people more than an obvious fact.

I never make an exception, which would break the principle of investigation.

6. You are observing, not observing.

7. Crime is common, but logic is rare. So you should pay more attention to the establishment of logic than the crime itself.

8。 Any real fact is better than an uncertain guess.

9. In solving such problems, previously assumed viewpoints must be established retroactively.

10. The weirder something is, the less secret it usually contains.

1 1. Some people who lack talent have an extraordinary power to inspire others (that is, bless themselves).

12. I never guess. That's a bad habit that destroys thinking.

13. In view of this, I want to say that nothing is more unusual than ordinary things and worth studying.

14. I just know things for a living. Maybe I trained myself to see through what others saw but ignored.

15. You can never predict what any single person will do, but you can make an accurate qualitative evaluation of human beings. Individuals may always be special exceptions, but in general, that's it.

Fear comes from imagination.