La discordancia y el principio

La discordancia y el principio is an investigative maxim that links two stages of reasoning: the discordance in a crime points toward the key clue, while the principle—the origin—shows where the case began and what its end contains. The novel gives the idea a concrete test through Doctor Berasategui: his fixation on Johana Márquez disrupts his accustomed conduct, and that break in pattern gives investigators the inconsistency they need to recognize.

The Maxim

The expression joins discordance and origin as complementary tools rather than competing explanations. A mismatch in a suspect’s behavior can reveal a clue; following the case back to its beginning can disclose the deeper basis of its conclusion. Its logic is causal: the end is not detached from the beginning but has its roots there.

Doctor Berasategui’s Deviation

Doctor Berasategui is described as an expert who should have known better. His response to Johana becomes an obsession, and that attachment leads him to act with a voracity that breaks his usual pattern. The crucial point is not merely that he makes a mistake, but that the mistake is legible as a departure from his established habits. His own confidence and expertise cannot prevent that deviation from exposing him.

Amaia’s Formulation

Amaia Salazar states the maxim first as the discordance and the principle, then reverses the order when she repeats it. She clarifies the distinction: in a murder investigation, discordance supplies the key, while the principle supplies the origin. The repeated formulation moves from a compact phrase to an explicit method, making clear that noticing an anomaly and tracing its source are related but separate acts of reasoning.

Investigative Significance

The maxim turns habit into evidence. Doctor Berasategui’s pattern is useful to investigators precisely because his fixation causes him to depart from it; what might otherwise remain concealed becomes visible as an inconsistency. The accompanying idea that people are bound by their habits gives the method its broader force: routine can conceal conduct, but a break in routine can expose it, while returning to the origin connects the clue to the case’s underlying end.