Since is in historical order we call the initial event and the final event of the pair. If these events always have the same quark coefficients for each sort of quark then we say that P is isolated. But if they are not all the same, then we say that P has undergone an interaction with some other particle generically called . Recall that quarks are conserved. So each kind of interaction implies a specific relationship between quark coefficients. Some possibilities are shown in the following table.
|Interaction||Coefficients ∀ q|
The quarks that are explicitly enumerated in the processes discussed above are named after their thermodynamic seeds. These seeds are in-turn defined by Anaxagorean sensations. So all the foregoing interactions are just detailed, systematic descriptions of thermal, visual and somatic sensations. Thermodynamic processes are objectified ways of recounting changes in what we see, hear and feel.