  There are two sorts of dissociation. First, as the rotation enters the as-yet-unmoved mass of ingredients, that mass begins to break up and the ingredients start to shift in their concentrations. This causes the original arrangement of ingredients to break up and begin to be rearranged. Because the mixture is a plenum, any separation is at the same time a rearrangement of ingredients. Then, those new rearrangements are themselves subject to further break-up and further rearrangement. Anaxagoras indicates this in the fragments by using different terms for different stages in the process (although he is not completely consistent in these uses). Normally, he uses the notion of being separated off (forms of the verb apokrinesthai) for the initial breaking apart of the mass. Re-arrangements are referred to as mixing (summisgesthai) or compacting (sumpêgnusthai). He also uses “joining together” (proskrinesthai) as a contrast to the separating off process (apokrinesthai) in B4a and B4b.  When, in B17, he claims that passing-away is really dissociation, he uses the word diakrinesthai. This is a later stage than the earliest separations off of B1. The primary terms are compound forms of the verb krinein, to distinguish. The word can also mean “to judge” or “to determine,” and through the use of these compound terms, Anaxagoras reminds his readers that all of the changes are ultimately traceable to the action of nous, or Mind, that sets the mass moving in the first instance.