> Before that, it was common to be shaved by the barber. Or.. the one who shaves all those, and those only, who do not shave themselves https://en.m.wikipedia

> Before that, it was common to be shaved by the barber. Or.. the one who shaves all those, and those only, who do not shave themselves https://en.m.wikipedia.org/wiki/Barber_paradox https://en.m.wikipedia.org/wiki/Barber_paradox