the murderer is always a man and a stranger, the reader has the same elements as the investigator, the same changes to solve the murder before him. it is in fact a very complex genre regarding to the private eye and crime fiction.
An "acceptable theory" is both
1. unproven in the complete sense of the word
and yet-
2. yeilds the same results time after time
Do not confuse this word with hypothesis or hunch when speaking...
It summarizes a set of observationsI have better; I'll give you three:1) It is based on observation and experiment2) If observations and experiments continue to support the theory, it may become...