Similar to the randomly initialized population, the competent GAs discovered the low-order BBs but failed to identify the deep BB. The injected deep BBs were lost in the subsequent-usually one or two-generations. Similar results were obtained even when as high as 5% of the population was doped with the deep BB. The results presented in this section clearly demonstrate that both BOA and ECGA fail to identify the deep BB and that they lose the deep BB even when the population is doped with a very few number of individuals with the deep BB. Therefore, we need to utilize other techniques to identify deep BBs when they occur in very few numbers in the population. One possible technique for so doing is chance discovery through KeyGraph, which is discussed in the following sections.