Nevertheless, these factors are separable, and it is necessary to distinguish between them if we are to understand, in detail, how they work together. Here, by

Nevertheless, these factors are separable, and it is necessary to distinguish between them if we are to understand, in detail, how they work together. Here, by equivocating and muddying the waters over the term 'evolution', broadening it to encompass learned methods of coping and thriving, the authors are impeding a clear understanding of how the factors work together.