The alternative reading of “laysa ka-mithlihi shayʾ” introduces the idea of kināyah: an intended meaning can be expressed by means of a necessary consequence rather than through direct wording. Kināyah is therefore not simply any lengthy or indirect sentence; it depends on a recognizable relation of implication.
The next chapter will treat the definition of kināyah, using a word for an associated necessary meaning, and the conditions under which the literal sense remains possible. This lesson has already separated wording, syntactic case, and indirect signification through consequences.
Keeping those dimensions distinct prepares a more accurate comparison of metaphor and kināyah in the following level.