Do you know about self-referential sentences. Below i are some one I have made up.
This sentence contains an error.
And how about questions that [may not] refer to themselves.
What doesn't this question make you think of ?
Are both paradoxical ? What do you think ?
Can you create a sentence / question that is self-referential ?

referential sentence
This sentence is here.
This sentence is not the last one written in this posting.
It is this one that is at the end.
don't you all
want to tie knots ?