- A male barber shaves all and only those men who do not shave themselves. Does he shave himself?
- Is the answer to this question no?
- I know that I know nothing at all
- A law student agrees to pay his teacher after winning his first case. The teacher then sues the student (who has not yet won a case) for payment.
- A Cretan says: "All Cretans are liars"
- It is opposite day today.
- Does the set of all those sets that do not contain themselves contain itself?