Realising that I could apply a basic ‘recipe’ to the activity of genes in the human tumours. It’s something similar to 25% eggs, 25% flour, 25% sugar and 25% butter in baking a cake. If you alter the %s, you get a different type of cake. One % = 1g or 100g, you just get a smaller/larger cake. All components are inter-related. By applying a similar % to gene activity, I was able to see similarities in tumours that had been missed before.