We propose to critically evaluate and strengthen the level of clinical evidence in psychoanalysis, using a strategy of triangulating clinical phenomena from different perspectives and increasing contextual knowledge. Insufficient discussion of alternative hypotheses and limited contextual information are two Achilles heels of psychoanalytic case presentations. We examine the concept and quality standards of clinical evidence in psychoanalysis and related disciplines, with particular attention to the contribution of the three-level model (3-LM). We analyze the case of a patient treated with transference-focused psychotherapy (TFP), making explicit the theoretical-clinical agreements and disagreements of the authors. We discuss the strengths and limitations of triangulation and contextualization, concluding that they make clinical work and psychoanalytic writing more reliable, transparent, auditable, and replicable.