system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: The difference between a Republic and a Democracy.

The US is considered to be an electoral democracy but also a republic? How? What? Why?
gpt
Republic and democracy refer to two completely different concepts.

Democracy means that power comes from the people.  So you elect representatives and their law giving power arises from that mandate and that satisfies the definition of a democracy.

Republic means the state is nominally owned by the people.  So ultimately no family or interest owns the country.

The US is both democracy and republic.  
To contrast:
Canada and Britain are democracies but not republics.  They are monarchies.
North Korea is not (functionally) a democracy but IS a republic.