Entailments are conclusions you draw if you use metaphors for Coping With Experience.
An example Lakoff and Johnson use is the `Love Is a Collaborative Work` metaphor. If love *is* collaborative work, then:
* Love is work. * Love is action. * Love requires cooperation. * Love requires discipline. * Love involves creativity. * ... and so on.
These are its entailments. `Love Is Madness` has a different set of entailments, like:
* Love is out of control. * Love is *in* control of the lover. * Love can't be refuted by reason. * Love *prevents* discipline.
You can't be using these two Metaphor Systems at the same time, but you *can* use them in succession. For example, your experience as a lover may mean the cooperative work Source Domain becomes less salient or prominent, and Madness takes its place.