Environmental signals and nutrient abundance. Environmental signals (green) and nutrient abundance (red, blue and grey) for the three environments (A, B, and AB (XOR) respectively) shown as a function of time steps within one epoch. Nutrient presence is a delayed function of the two signals. The same signals and nutrients are present in all environments (i.e. all cells have the same special triplet function), but with different temporal dynamics. One epoch is shown in each plot, which consists of 4,500 time units total.