@Setanta,
Setanta ...and I thought you were mellowing a little !
Note that "illogical sentences" do not necessarily point to "religious themes" but can be taken to indicate philosophically interesting aspects of semantics.
Noam Chomsky, for example, made a good living on the fallout from his sentence "Colorless green ideas sleep furiously"and Quine (the logician) came to the conclusion that the meaning of a sentence depended on the context of its usage, not its constituent parts. In general it can be argued that "logic" is a sub-aspect of semantics and religions or "transcendent movements" tend to cash in on this. This is why it is futile to engage proponents of those ideas using specifically logical terms such as "truth" and "proof", despite the fact that less intelligent religionists attempt just that.
A cursory glance at the "Standard Model" in physics with such bizarre concepts as "particles in two places at once" indicates that there may be more to epistemology than we can account for with language. And that is valid irrespective of Zen Koan traditions.