APOE and dementia: The reported errors are for the reference participant in the reference forecast design: a 75-year-old American woman from the ADNI cohort with an average education level, no APOE-ε4 mutations, and an A + T + N + status with a questionable dementia (CDR = 0.5 noted C~), for whom we forecast neuropsychological assessments in three years’ time, based on two past visits separated by eight months with no missing data.