Another way to verify homeopathic symptoms is applying Multivariate Analysis (MVA) on a combination of symptoms to make a differential diagnosis between homeopathic medicines. In the practice of the Swiss pediatrician Heiner Frei all patients fill in the same questionnaire about some 30 modalities with opposite values, like 'Warmth aggravates' and 'Warmth ameliorates'. These are called 'Polar Symptoms'. The representations of such symptoms in Kent's repertory is problematic because many medicines are entered in both opposite symptom rubrics. By these entries we think that both opposite symptoms indicate the same medicine, buth this is definitely not true. You can read the paper about assessing Polar Symptoms by clicking her.