I know what a geodesic is, but it seems like you're defining a straight line as the shortest distance between two points regardless of the space its in.
Let me ask my question in this way. The shortest distance between two points in some flat space forms a straight line, and every straight...
In our universe, is the shortest distance between two points a straight line or a hyperbolic curve? (I'm debating this with my teacher)
Of course you're going to ask me for the definition of a straight line but I don't think I can define that relative to a curved line without getting...