SV = El Salvador? South Vietnam?

I suppose you mean Silicon Valley, but I live on the East Coast (~3000 miles away). Also, our "tripartite separation" is based on yours, with the President taking the place of the Monarch/Prime Minister, the Congress taking the place of Parliament, and the Judiciary being roughly the same (we even use the same style of law, called common law, whereas most non-English-speaking countries use civil law).

The UK seems to have more crossover between legislative and executive functions, but the separation does exist, more or less. Parliament makes the laws. Various ministers execute the laws. The courts interpret the laws.