It has been de rigeur in Greece to take your shoes off when entering a house, as owner or guest. Indeed, Greek has borrowed the Turkish proverbial expression about it: to “hand someone their shoes” is to invite them to get the hell out of your house. (του ’δωσα τα παπούτσια στο χέρι/pabuçu eline vermek).

I will note that while it’s a norm I follow to this day as a householder, it’s not one I experienced as a guest in Greece: I don’t remember ever having to remove my shoes when a guest. In fact, it was only when I crashed at an uncle’s place for a few days that the spare slippers would surface.

Originally Answered:

How does Quora combat duplicates of other questions and answers?

Dupes of answers: Quora does nothing to prevent us, and God preserve us from the day when it does. Bots unleashed to collapse answers left and right, muttering “this answer has three words in common with the next answer. Exterminate! Exterminate!”

Dupes of questions: Quora has conflated the search bar and the question bar, in the hope you’ll notice as you’re typing that similar questions have already been asked. Quora also displays similar questions in the sidebar, which triggers users to merge them. Both reasonable actions.