Daniel Kahneman convincingly disputes that heuristic shortcuts produce cognitive biases; large doses of patience and reflection are needed to counteract them [1], although sometimes this is impossible to achieve. Cooksley et al. have recently published a brief review of the literature on Febrile Neutropenia (FN), using potentially inconsistent arguments [2]. The authors cite the result of an independent series that proves the Clinical Index of Stable Febrile Neutropenia (CISNE) to be superior to the Multinational Association of Supportive Care in Cancer (MASCC) score in predicting neutropenic complications [3].