@Tamanna21 10 August 2020

paradox-1

Impossible barber paradox The barber paradox is a puzzle derived from Russell's paradox. It is about a barber who is defined such that he both shaves himself and doesn't shave himself.

Let's have an explanation : Our barber is very active and he shaves those and only those who don't shave themselves. doesn't shave those who shave themselves. Now the question is: **Does the barber shave himself?**

While answering you'll face a contradiction. As we have seen a barber is the one who shaves those who don't shave themselves. So- if he shaves himself, he can't be a barber. Because the barber only shaves them who don't shave themselves. if he doesn't shave, he falls in the category of those who do not shave themselves, and so, cannot be a barber. In 1901, mathematician and philosopher Bertrand Russell was investigating set theory. That time a central idea was every property can be defined with set. For example : A set of green things, a set of numbers without 9 etc. Moreover, a set can contains many other sets. This very set is called universal set.

Now say, a universal set have exactly two elements. The problem comes when pondering the possibility of a universal set that do not contain themselves — like the barber, this seems to be impossible. The puzzle of impossible barber shows that an apparently plausible scenario is logically impossible. Special thanks to **@Ashma** for this great support and cordial help to everyone. https://read.cash/@Ashma If you want to be sponsored, please join the following community: **https://read.cash/c/get-sponsored-2a0b** You can not only get sponsorship here but also can earn points by doing some simple tasks. Thanks again **@Ashma** for creating this amazing community. https://read.cash/@Ashma