Is it possible for two countries to declare war, and for both countries to have acted legally? (That is, according to international law.) What are the conditions? e.g. a fight over territory with not racial element? Are there any wars in history that qualify? Does goes to war to recapture a queen count? Were WWI and WWII legal? (At the outset.)
Why is it that movies in movie theatres cost the same, irrespective or run time and the amount they cost to make?
Why is it that in most (all?) cities, taxis are regulated such that the price you pay is exactly the same?