The term INS is not necessarily filler - it's often used as code for great circle.
Very fair point. What I meant by my statement was to always step back from the question to see what they’re really asking and to take a moment to ask why they’ve added certain terms. Is it to give you more information or is it simply to distract you into going down the wrong garden path?
Question everything; including the question itself.
Challenge accepted..
Well played sir. It got the conversation rolling from basic to advanced.