Combined Actions

Here is a list of rather obvious actions that are common to both Rabbits and Stem Cells:

-Live

-Reproduce

-Die

These actions are essential to creating a definition for proliferate . It is known that both rabbits and stem cells proliferate (see simile in Presentation Two) so actions that are common to both classes may yield a consequence suitable for proliferate. It just so happens that reproduce holds a consequence that fits nicely with proliferate (though neither "live" or "die" hold consequences of any use.)

A rule is used to assign these common actions:

Forall x and y

If x or y are of class Rabbit and Stem Cell respectively,

then x or y can live, die or reproduce.

(Diagram leaves out Ehrlich's idea of collections and all actions for brevity.)